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2024年3月30日 (六) 14:28的最新版本

Οmicrοn（/ˈoʊmɪkrɒn, ˈɒmɪkrɒn, oʊˈmaɪkrɒn/;^[1] 大写Ο，小写ο，中文音译：奥米克戎^[2]、奥密克戎、歐米克隆）是第15个希腊字母。在希腊数字系统中，它的数值为70。这个字母来源于腓尼基字母ayin：。在古希臘語中，οmicrοn代表的发音是[o]，与omega [ɔː]和ου [oː]形成对立。在现代希腊语中，οmicrοn代表中後圓唇元音/o̞/ ，与omega同音。由οmicrοn产生的字母包括罗马字母O和西里尔字母O。

用处

除了作为字母使用外，omicron偶尔也用于技术符号，但其用途有限，因为大写和小写（Ο ο）都与拉丁字母O无法区分，也难以与阿拉伯数字0区别。

数学

由Paul Bachmann在1894年提出、愛德蒙·蘭道在1909年推广的大O符号，最初代表“order of”（"Ordnung"，阶），因此是一个拉丁字母，显然在1976年被高德纳视为大写的Omicron^[3]，可能是参考了他对符号（大写）Omega的定义。Bachmann和蘭道都没有称它为“Omicron”，“Omicron”这个词在克努特的论文中只出现过一次，而且只是在标题中。

希腊数字

在希腊语中，有几种数字书写系统；在古典时代后期，最常见的形式是用omicron（大写或小写）来代表70这个数值。

更为普遍的是，在任何希腊字母标记的列表中，字母omicron都被用来标记第15个序数的位置。因此，例如在欧几里得的《几何原本》中，当几何图中的各个点用字母标记时，实际上与用数字标记相同，每个字母代表其在标准字母表中的位置数字。^[a]^[b]

天文学

Omicron用于指定一个星座组中的第十五颗星，它的序数位置是星等和位置的不规则函数。^[4]^[5]这样的恒星包括Omicron Andromedae、Omicron Ceti和Omicron Persei。

在克劳狄乌斯·托勒密（约约100–170）的《天文學大成》中，1 ... 59的六十進制数字表是以希腊数字的传统方式^[c]表示： $'α$ ... $'νθ$ 。由于字母omicron[在标准系统中代表70（′ο）]在六进制中没有使用，它被重新用于代表一个空的数字单元。在某些版本中，该单元格只是留有空白（那里没有东西=数值为零），但为了避免复制错误，人们倾向于用omicron标记一个零单元格，就像现代表格中的空白单元格用破折号（-）填充一样。Omicron和破折号都意味着“这不是一个错误，这个单元格实际上应该是空的”。巧合的是，古代的零值omicron（ $ο$ ）类似于现代阿拉伯数字的零（0）。

用以命名冠狀病毒2型的變異株

2021年11月26日，世界卫生组织宣布COVID-19的一个新的变异株值得关注，根据世卫组织的命名系统命名为Omicron。B.1.1.529变异株于2021年11月24日在南非首次被测序。^[6]

字符编码

Greek Omicron / Coptic O^[7]

字符	Ο		ο		Ⲟ		ⲟ
Unicode名称	Greek Capital Letter Omicron		Greek Small Letter Omicron		Coptic Capital Letter O		Coptic Small Letter O
编码	十进制	十六进制	十进制	十六进制	十进制	十六进制	十进制	十六进制
Unicode	405	U+039F	425	U+03BF	3304	U+2C9E	3305	U+2C9F
UTF-8	206 159	CE 9F	206 191	CE BF	226 178 158	E2 B2 9E	226 178 159	E2 B2 9F
UTF-16	927	039F	959	03BF	11422	2C9E	11423	2C9F
字符值引用	Ο	Ο	ο	ο	Ⲟ	Ⲟ	ⲟ	ⲟ
字符值引用	Ο		ο
DOS Greek	142	8E	166	A6
DOS Greek-2	190	BE	233	E9
Windows 1253	207	CF	239	EF

Mathematical Omicron^[8]

这些字符只作为数学符号使用。风格化的希腊文应使用正常的希腊字母进行编码，用标记和文本格式来表示文本风格。

字符	𝚶		𝛐		𝛰		𝜊		𝜪		𝝄
Unicode名称	Mathematical Bold Capital Omicron		Mathematical Bold Small Omicron		Mathematical Italic Capital Omicron		Mathematical Italic Small Omicron		Mathematical Bold Italic Capital Omicron		Mathematical Bold Italic Small Omicron
编码	十进制	十六进制	十进制	十六进制	十进制	十六进制	十进制	十六进制	十进制	十六进制	十进制	十六进制
Unicode	23716	U+1D6B6	23730	U+1D6D0	23750	U+1D6F0	23710	U+1D70A	23730	U+1D72A	23744	U+1D744
UTF-8	240 157 154 182	F0 9D 9A B6	240 157 155 144	F0 9D 9B 90	240 157 155 176	F0 9D 9B B0	240 157 156 138	F0 9D 9C 8A	240 157 156 170	F0 9D 9C AA	240 157 157 132	F0 9D 9D 84
UTF-16	55349 57014	D835 DEB6	55349 57040	D835 DED0	55349 57072	D835 DEF0	55349 57098	D835 DF0A	55349 57130	D835 DF2A	55349 57156	D835 DF44
字符值引用	𝚶	𝚶	𝛐	𝛐	𝛰	𝛰	𝜊	𝜊	𝜪	𝜪	𝝄	𝝄

字符	𝝤		𝝾		𝞞		𝞸
Unicode名称	Mathematical Sans-Serif Bold Capital Omicron		Mathematical Sans-Serif Bold Small Omicron		Mathematical Sans-Serif Bold Italic Capital Omicron		Mathematical Sans-Serif Bold Italic Small Omicron
编码	十进制	十六进制	十进制	十六进制	十进制	十六进制	十进制	十六进制
Unicode	23764	U+1D764	23784	U+1D77E	23804	U+1D79E	23818	U+1D7B8
UTF-8	240 157 157 164	F0 9D 9D A4	240 157 157 190	F0 9D 9D BE	240 157 158 158	F0 9D 9E 9E	240 157 158 184	F0 9D 9E B8
UTF-16	55349 57188	D835 DF64	55349 57214	D835 DF7E	55349 57246	D835 DF9E	55349 57272	D835 DFB8
字符值引用	𝝤	𝝤	𝝾	𝝾	𝞞	𝞞	𝞸	𝞸

说明性脚注

^ Greek letters-as-numbers used an older Greek alphabet with three more otherwise unused letters, two of them re‑instated in their old locations, early in the alphabet. So positions higher than 5th place ( $ε$ ) were shifted from the standard alphabet; 5th place was marked with normal fifth letter epsilon ( $ε$ ). The 6th letter in the conventional alphabet, that normally follows $ε$ is $ζ$ (zeta) but the number 6 was represented a revived ancient letter $' ϝ$ (digamma), followed by $' ζ$ which was pushed up from 6th to its ancient position (7th) to represent the number 7. All of the letters after $ζ$ were likewise shifted up one place, until the second ancient letter koppa, ( $ϙ$ ), was reached; it fell between $π$ and $ρ$ . Ever letter from ρ to ω was shifted two places past its conventional ordinal position. Last place coming right after omega ( $ω$ , 800) was sampi ( $ϡ$ ) which represented 900. (From that point, the system restarted, with a new tick-mark, at $͵ α$ . The tick-mark was put in a different place ( $͵ α$ rather than $' α$ ) to show that the letter represented a multiple of 1,000 rather than 1.)
^ From Euclid up to the 19th century, mathematical and technical diagrams were habitually marked sequentially with letters (or numbers), whereas in modern mathematical and scientific diagrams, it is much more common to choose for markers letters that might remind readers of the word used to describe the item in question. For example, Feynman diagrams in particle physics label the positions of particles with the first letter of their name, either in the Latin or Greek alphabet. So $p$ , $n$ , and $e$ , represent the position on a diagram of a proton, neutron, and electron, respectively. The neutrino is represented by $ν$ (Greek "nu"), since the Latin letter " $n$ " is reserved for the neutron.
^ Sexagesimal Greek numbers in the Almagest are conventional: 1 2 3 4 5 6 7 8 9 $= 'α 'β 'γ 'δ 'ε ' ϝ'ζ 'η 'θ$ . Notice that ancient digamma ( $ϝ$ ) is used for 6 instead of zeta ( $ζ$ , which is used for 7) ; 10 20 30 40 50 $= 'ι 'κ 'λ 'μ 'ν$ . Adjacent number-letters add, so all the other numbers are made by letter pairs, such as 29 30 31 $= 'κθ 'λ 'λα$ . The number 59 ( $'νθ$ ) is the largest value used in a single cell in sexagesimal. That leaves xi ( $ξ$ ) and the letters following it $ξ ο π ϙ ρ σ τ υ φ χ ψ ω ϡ$ free for other use: Ptolemy picked $ο$ , which normally was used for 70, to mark empty (zero) cells, perhaps because the word for "nothing", $οὐδέν$ starts with an omicron.

参考文献

^ omicron. 牛津英語詞典 (第三版). 牛津大學出版社. 2005-09 （英语）.
^ 希腊字母的汉字规范译音. 中国科技术语. 2003, 5 (03) [2021-11-30]. ISSN 1673-8578. （原始内容存档于2021-09-21）. 奥米克戎
^ Knuth, Donald. Big Omicron and big Omega and big Theta (PDF). SIGACT News. April–June 1976, 8 (2): 18–24 [2021-11-28]. S2CID 5230246. doi:10.1145/1008328.1008329. （原始内容存档 (PDF)于2021-11-30）.
^ Martin, Martha Evans. The Friendly Stars 1st. New York: Harper & Brothers Publishers. 1907: 135 [8 February 2016].
^ Wilk, Stephen R. Medusa: Solving the Mystery of the Gorgon 1st. New York, NY; London, UK: Oxford University Press. 2007: 201 [8 February 2016]. ISBN 9780199887736. （原始内容存档于2022-01-30）.
^ Classification of Omicron (B.1.1.529): SARS-CoV-2 Variant of Concern. World Health Organization. [26 November 2021]. （原始内容存档于2021-11-26）.
^ Greek and Coptic (Range: 0370–03FF) (PDF). The Unicode Standard, Ver. 8.0. Unicode, Inc. 2015 [8 February 2016]. （原始内容存档 (PDF)于2022-02-15）.
^ Mathematical Alphanumeric Symbols (Range: 1D400–1D7FF) (PDF). The Unicode Standard, Ver. 8.0. Unicode, Inc. 2015 [8 February 2016]. （原始内容存档 (PDF)于2021-10-16）.

外部链接

维基词典中的词条「Ο」
维基词典中的词条「ο」

[ordinal_greek_letters-4] Greek letters-as-numbers used an older Greek alphabet with three more otherwise unused letters, two of them re‑instated in their old locations, early in the alphabet. So positions higher than 5th place ( $ε$ ) were shifted from the standard alphabet; 5th place was marked with normal fifth letter epsilon ( $ε$ ). The 6th letter in the conventional alphabet, that normally follows $ε$ is $ζ$ (zeta) but the number 6 was represented a revived ancient letter $' ϝ$ (digamma), followed by $' ζ$ which was pushed up from 6th to its ancient position (7th) to represent the number 7. All of the letters after $ζ$ were likewise shifted up one place, until the second ancient letter koppa, ( $ϙ$ ), was reached; it fell between $π$ and $ρ$ . Ever letter from ρ to ω was shifted two places past its conventional ordinal position. Last place coming right after omega ( $ω$ , 800) was sampi ( $ϡ$ ) which represented 900. (From that point, the system restarted, with a new tick-mark, at $͵ α$ . The tick-mark was put in a different place ( $͵ α$ rather than $' α$ ) to show that the letter represented a multiple of 1,000 rather than 1.)

[diagrams-5] From Euclid up to the 19th century, mathematical and technical diagrams were habitually marked sequentially with letters (or numbers), whereas in modern mathematical and scientific diagrams, it is much more common to choose for markers letters that might remind readers of the word used to describe the item in question. For example, Feynman diagrams in particle physics label the positions of particles with the first letter of their name, either in the Latin or Greek alphabet. So $p$ , $n$ , and $e$ , represent the position on a diagram of a proton, neutron, and electron, respectively. The neutrino is represented by $ν$ (Greek "nu"), since the Latin letter " $n$ " is reserved for the neutron.

[why_omicron_is_available-8] Sexagesimal Greek numbers in the Almagest are conventional: 1 2 3 4 5 6 7 8 9 $= 'α 'β 'γ 'δ 'ε ' ϝ'ζ 'η 'θ$ . Notice that ancient digamma ( $ϝ$ ) is used for 6 instead of zeta ( $ζ$ , which is used for 7) ; 10 20 30 40 50 $= 'ι 'κ 'λ 'μ 'ν$ . Adjacent number-letters add, so all the other numbers are made by letter pairs, such as 29 30 31 $= 'κθ 'λ 'λα$ . The number 59 ( $'νθ$ ) is the largest value used in a single cell in sexagesimal. That leaves xi ( $ξ$ ) and the letters following it $ξ ο π ϙ ρ σ τ υ φ χ ψ ω ϡ$ free for other use: Ptolemy picked $ο$ , which normally was used for 70, to mark empty (zero) cells, perhaps because the word for "nothing", $οὐδέν$ starts with an omicron.

[1] ron. 牛津英語詞典 (第三版). 牛津大學出版社. 2005-09 （英语）.

[termcn-2] 希腊字母的汉字规范译音. 中国科技术语. 2003, 5 (03) [2021-11-30]. ISSN 1673-8578. （原始内容存档于2021-09-21）. 奥米克戎

[knuth-3] Knuth, Donald. Big Omicron and big Omega and big Theta (PDF). SIGACT News. April–June 1976, 8 (2): 18–24 [2021-11-28]. S2CID 5230246. doi:10.1145/1008328.1008329. （原始内容存档 (PDF)于2021-11-30）.

[martin-6] Martin, Martha Evans. The Friendly Stars 1st. New York: Harper & Brothers Publishers. 1907: 135 [8 February 2016].

[wilk-7] Wilk, Stephen R. Medusa: Solving the Mystery of the Gorgon 1st. New York, NY; London, UK: Oxford University Press. 2007: 201 [8 February 2016]. ISBN 9780199887736. （原始内容存档于2022-01-30）.

[9] Classification of Omicron (B.1.1.529): SARS-CoV-2 Variant of Concern. World Health Organization. [26 November 2021]. （原始内容存档于2021-11-26）.

[U0370-10] Greek and Coptic (Range: 0370–03FF) (PDF). The Unicode Standard, Ver. 8.0. Unicode, Inc. 2015 [8 February 2016]. （原始内容存档 (PDF)于2022-02-15）.

[U1D400-11] Mathematical Alphanumeric Symbols (Range: 1D400–1D7FF) (PDF). The Unicode Standard, Ver. 8.0. Unicode, Inc. 2015 [8 February 2016]. （原始内容存档 (PDF)于2021-10-16）.

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@@ 第1行： / 第1行： @@
+{{重定向至此|奥密克戎|引发COVID-19的病毒變種|严重急性呼吸系统综合征冠状病毒2奥密克戎变异株}}
-_/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_ _/|\_
+{{distinguish|text=[[O|拉丁字母O]]或[[О|西里尔字母Ο]]}}
-{{not|О|O}}
+{{Greek_alphabet_sidebar|corrlat=[[o]]|corrcyr=[[о]]|corrheb=[[ע]]|corrarab=[[ع]]|corrarm=[[ո]]|corrgeo=[[ო]]|corrph=[[Image:Phoenician ayin.svg|20px]]|letter=omicron}}
-{{Infobox Greek|uc=Ο|lc=ο|Image=Omicron uc lc.svg|numeral=70|uuc=039F|uucb=|ulc=03BF|ulcb=|greek8uc=CF|greek8lc=EF|elname=''ομικρον''|elsound=omikron|grcsound=omicron|enname=omicron|elphone=o|grcphone=o|eltranslit=o|grctranslit=o|corrarab=ʿ|corrcyr=[[о]]|corrheb=ע|corrlat=[[o]]|corrph=[[File:Phoenician ayin.png|20px|center]]}}
+'''Οmicrοn'''（{{IPAc-en|'|oʊ|m|ɪ|k|r|ɒ|n|,_|'|ɒ|m|ɪ|k|r|ɒ|n|,_|oʊ|'|m|aɪ|k|r|ɒ|n}};<ref>{{OED|omicron}}</ref> 大写'''Ο'''，小写'''ο'''，中文音译：'''奥米克戎'''<ref name="termcn">{{cite journal|title=希腊字母的汉字规范译音|url=http://www.term.org.cn/CN/abstract/abstract11339.shtml|accessdate=2021-11-30|journal=中国科技术语|year=2003|issue=03|volume=5|issn=1673-8578|url-status=live|archive-url=https://web.archive.org/web/20210921110815/http://www.term.org.cn/CN/abstract/abstract11339.shtml|archive-date=2021-09-21|quote=奥米克戎}}</ref>、'''奥密克戎'''、'''歐米克隆'''）是第15个[[希腊字母]]。在[[希腊数字]]系统中，它的数值为70。这个字母来源于腓尼基字母[[Ayin|ayin]]：[[Image:Phoenician ayin.svg|20px]]。在[[古希臘語]]中，οmicrοn代表的发音是{{IPAblink|o}}，与omega {{IPA|[ɔː]}}和ου {{IPA|[oː]}}形成[[最小對立體|对立]]。在[[现代希腊语]]中，οmicrοn代表[[中後圓唇元音]]{{IPA|/o̞/ }}，与omega同音。由οmicrοn产生的字母包括罗马字母[[O]]和西里尔字母[[О|O]]。
+==用处==
-'''Omicron'''（大写Ο，小写ο，中文音译：'''奥密克戎'''），是第十五个[[希腊字母]]。Omicron 字面上的意思是“小的 O”（''o mikron''），以便與[[ω]]“''o mega''，大 O”區別。
+除了作为字母使用外，omicron偶尔也用于技术符号，但其用途有限，因为大写和小写（&Omicron; &omicron;）都与拉丁字母O无法区分，也难以与[[阿拉伯数字]]0区别。
+===数学===
-它在[[希腊数字]]中代表70。这个字母由于与拉丁字母 O 和数字 0 相似，人们大多不会使用这个字母作符号用途。
+由Paul Bachmann在1894年提出、[[愛德蒙·蘭道]]在1909年推广的[[大O符号]]，最初代表“order of”（"Ordnung"，阶），因此是一个拉丁字母，显然在1976年被[[高德纳]]视为大写的Omicron<ref name="knuth">{{cite journal |first=Donald |last=Knuth |url=http://www.phil.uu.nl/datastructuren/10-11/knuth_big_omicron.pdf |title=Big Omicron and big Omega and big Theta |journal=SIGACT News |date=April–June 1976 |volume=8 |issue=2 |pages=18–24 |doi=10.1145/1008328.1008329 |s2cid=5230246 |access-date=2021-11-28 |archive-date=2021-11-30 |archive-url=https://web.archive.org/web/20211130005215/https://www.phil.uu.nl/datastructuren/10-11/knuth_big_omicron.pdf |dead-url=no }}</ref>，可能是参考了他对符号（大写）[[Omega]]的定义。Bachmann和蘭道都没有称它为“Omicron”，“Omicron”这个词在克努特的论文中只出现过一次，而且只是在标题中。
-大写Ο用於：
-* [[大O符号]]
-[[Category:希腊字母]]
+===希腊数字===
+{{main|希腊数字}}
+在希腊语中，有几种数字书写系统；在古典时代后期，最常见的形式是用omicron（大写或小写）来代表70这个数值。
+更为普遍的是，在任何希腊字母标记的列表中，字母omicron都被用来标记第15个序数的位置。因此，例如在[[欧几里得]]的《[[几何原本]]》中，当[[几何学|几何]]图中的各个点用字母标记时，实际上与用数字标记相同，每个字母代表其在标准字母表中的位置数字。{{efn
-[[als:Ο]]
+|name=ordinal_greek_letters|
-[[ar:أوميكرون]]
+Greek [[希腊数字|letters-as-numbers]] used an older Greek alphabet with three more otherwise unused letters, two of them re‑instated in their old locations, early in the alphabet. So positions higher than 5th place ({{mvar|[[Ε|&epsilon;]]}}) were shifted from the standard alphabet; 5th place was marked with normal fifth letter [[epsilon]] ({{math|[[Ε|&epsilon;]]}}). The 6th letter in the conventional alphabet, that normally follows  {{math|[[Ε|&epsilon;]]}}  is  {{math|[[Ζ|&zeta;]]}}  ([[zeta]]) but the ''number'' 6 was represented a revived ancient letter {{mvar|&prime;[[Ϝ|ϝ]]}} ([[digamma]]), followed by {{math|&prime;[[Ζ|&zeta;]]}} which was pushed up from 6th to its ancient position (7th) to represent the number 7. All of the letters after {{math|[[Ζ|&zeta;]]}} were likewise shifted up one place, until the second ancient letter [[koppa (letter)|koppa]], ({{math|[[Ϙ|ϙ]]}}), was reached; it fell between {{math|[[Π|&pi;]]}} and {{math|[[Ρ|&rho;]]}}. Ever letter from [[Ρ|&rho;]] to [[Ω|&omega;]] was shifted ''two'' places past its conventional ordinal position. Last place coming right after [[omega]] ({{math|[[Ω|&omega;]]}}, 800) was [[Ͳ|sampi]] ({{math|ϡ}}) which represented 900. (From that point, the system restarted, with a new tick-mark, at {{math|'''{{big|͵}}'''[[Α|α]]}}. The tick-mark was put in a different place ({{math|'''{{big|͵}}'''[[Α|α]]}} rather than {{math|&prime;[[Α|α]]}}) to show that the letter represented a multiple of 1,000 rather than 1.)
-[[arc:Ο]]
+}}{{efn
-[[bar:Omikron]]
+|name=diagrams|
-[[be:О мікрон]]
+From [[几何原本|Euclid]] up to the 19th&nbsp;century, mathematical and technical diagrams were habitually marked sequentially with letters (or numbers), whereas in modern mathematical and scientific diagrams, it is much more common to choose for markers letters that might remind readers of the ''word'' used to describe the item in question. For example, [[费曼图|Feynman diagram]]s in [[粒子物理學|particle physics]] label the positions of particles with the first letter of their name, either in the Latin or Greek alphabet. So &nbsp;{{math|p}}, {{math|n}}, and {{math|e}}&nbsp;, represent the position on a diagram of a &nbsp;[[質子|<u>p</u>roton]], [[中子|<u>n</u>eutron]], and [[电子|<u>e</u>lectron]],&nbsp; respectively. The [[中微子|<u>n</u>eutrino]] is represented by {{mvar|[[Ν|&nu;]]}} (Greek [[Ν|"nu"]]), since the Latin letter "{{math|n}}" is reserved for the [[中子|<u>n</u>eutron]].
-[[bg:Омикрон]]
+}}
-[[bo:ཨོ་མི་ཁི་རོན།]]
-[[br:Omikron (lizherenn)]]
+===天文学===
-[[ca:Òmicron]]
+Omicron用于指定一个星座组中的第十五颗星，它的序数位置是星等和位置的不规则函数。<ref name="martin">
-[[ckb:ئۆمیکرۆن]]
+{{cite book
-[[cs:Omikron]]
+ |last=Martin |first=Martha Evans
-[[cy:Omicron]]
+ |year=1907
-[[da:Omikron]]
+ |title=The Friendly Stars
-[[de:Omikron]]
+ |edition=1st |page=[https://archive.org/details/friendlystars01martgoog/page/n154 135]
-[[el:Όμικρον]]
+ |publisher=[[Harper (publisher)|Harper & Brothers Publishers]]
-[[en:Omicron]]
+ |location=New York
-[[eo:Omikrono]]
+ |url=https://archive.org/details/friendlystars01martgoog
-[[es:Ο]]
+ |access-date=8 February 2016
-[[et:Omikron]]
+}}
-[[eu:Omikron]]
+</ref><ref name="wilk">{{cite book
-[[fa:امیکرون (حرف)]]
+ |last=Wilk
-[[fi:Omikron]]
+ |first=Stephen R.
-[[fr:Omicron]]
+ |year=2007
-[[ga:Oimiocrón]]
+ |title=Medusa: Solving the Mystery of the Gorgon
-[[gd:Omicron]]
+ |edition=1st
-[[gl:Omicrón]]
+ |page=201
-[[he:אומיקרון]]
+ |publisher=[[牛津大學出版社|Oxford University Press]]
-[[hr:Omikron]]
+ |location=New York, NY; London, UK
-[[ht:Ο]]
+ |isbn=9780199887736
-[[hu:Omikron]]
+ |url=https://books.google.com/books?id=OnHO4orvz18C&pg=PT201
-[[id:Omikron]]
+ |access-date=8 February 2016
-[[is:Ómíkron]]
+ |archive-date=2022-01-30
-[[it:Omicron]]
+ |archive-url=https://web.archive.org/web/20220130234442/https://books.google.com/books?id=OnHO4orvz18C&pg=PT201
-[[ja:Ο]]
+ |dead-url=no
-[[ka:ომიკრონი (ასო)]]
+ }}</ref>这样的恒星包括[[车府增十六|Omicron Andromedae]]、[[蒭藁增二|Omicron Ceti]]和[[英仙座ο|Omicron Persei]]。
-[[ko:Ο]]
-[[ku:Omicron]]
+在[[克劳狄乌斯·托勒密]]（约{{circa|100–170}}）的《[[天文學大成]]》中，1 ... 59的[[六十進制]]数字表是以希腊数字的传统方式{{efn
-[[la:Omicron]]
+|name=why_omicron_is_available|
-[[lb:Omikron]]
+[[Sexagesimal]] [[希腊数字|Greek numbers]] in the ''[[天文學大成|Almagest]]'' are [[希腊数字|conventional]]: &nbsp; 1 2 3 4 5 6 7 8 9  {{math|&nbsp;{{=}}&nbsp; &prime;α  &prime;β  &prime;γ  &prime;&delta;  &prime;&epsilon;    &prime;''ϝ''  &prime;&zeta;  &prime;&eta;  &prime;θ}}&nbsp;. Notice that ancient [[digamma]] ({{mvar|ϝ}}) is used for &nbsp;6&nbsp; instead of [[zeta]] ({{math|&zeta;}}, which is used for 7)&nbsp;; &nbsp; 10  20  30  40  50 {{math|&nbsp;{{=}}&nbsp; &prime;&iota;  &prime;&kappa;  &prime;λ  &prime;&mu;  &prime;&nu;}}&nbsp;. Adjacent number-letters add, so all the other numbers are made by letter pairs, such as &nbsp;29  30  31 {{math| &nbsp;{{=}}&nbsp; &prime;&kappa;θ  &prime;λ  &prime;λα}}&nbsp;. The number 59 ({{math|&prime;&nu;θ}}) is the largest value used in a single cell in [[六十進制|sexagesimal]]. That leaves [[Ξ|xi]] ({{math|&xi;}}) and the letters following  it &nbsp;{{math| &xi; &omicron; &pi; ϙ &rho; &sigma; &tau; &upsilon; &phi; &chi; &psi; &omega; ϡ}}&nbsp; free for other use: [[克劳狄乌斯·托勒密|Ptolemy]] picked {{math|&nbsp;&omicron;&nbsp;}}, which normally was used for 70, to mark empty (zero) cells, perhaps because the word for "nothing", {{math|οὐδέν}} starts with an omicron.
-[[lez:Омикрон]]
+}}表示：{{math|&prime;α}} ... {{math|&prime;&nu;θ}}。由于字母omicron[在标准系统中代表70（′ο）]在六进制中没有使用，它被重新用于代表一个空的数字单元。在某些版本中，该单元格只是留有空白（那里没有东西=数值为零），但为了避免复制错误，人们倾向于用omicron标记一个零单元格，就像现代表格中的空白单元格用破折号（-）填充一样。Omicron和破折号都意味着“这不是一个错误，这个单元格实际上应该是空的”。巧合的是，古代的零值omicron（{{math|&omicron;}}）类似于现代[[阿拉伯数字]]的零（0）。
-[[lt:Omikron (raidė)]]
-[[lv:Omikrons]]
+===用以命名冠狀病毒2型的變異株 ===
-[[mr:ओमिक्रॉन]]
+{{main|嚴重急性呼吸道症候群冠狀病毒2型Omicron變異株}}
-[[ms:Omikron]]
+年11月26日，[[世界卫生组织]]宣布[[2019冠状病毒病|COVID-19]]的一个新的变异株值得关注，根据世卫组织的命名系统命名为[[嚴重急性呼吸道症候群冠狀病毒2型Omicron變異株|Omicron]]。B.1.1.529变异株于2021年11月24日在[[南非]]首次被测序。<ref>{{cite web
-[[nah:Ο]]
+ |title=Classification of Omicron (B.1.1.529): SARS-CoV-2 Variant of Concern
-[[nds:Omikron]]
+ |url=https://www.who.int/news/item/26-11-2021-classification-of-omicron-(b.1.1.529)-sars-cov-2-variant-of-concern
-[[nl:Omikron]]
+ |publisher=World Health Organization
-[[nn:Omikron]]
+ |access-date=26 November 2021
-[[no:Omikron]]
+ |archive-date=2021-11-26
-[[pl:Omikron]]
+ |archive-url=https://web.archive.org/web/20211126180836/https://www.who.int/news/item/26-11-2021-classification-of-omicron-%28b.1.1.529%29-sars-cov-2-variant-of-concern
-[[pt:Ο]]
+ |dead-url=no
-[[ru:Омикрон]]
+ }}</ref>
-[[se:Ο]]
-[[sh:Omikron]]
+==字符编码==
-[[simple:Omicron]]
+* '''Greek Omicron / Coptic O'''<ref name="U0370">{{cite web |url=https://www.unicode.org/charts/PDF/U0370.pdf |title=Greek and Coptic (Range: 0370–03FF) |year=2015 |work=[[Unicode|The Unicode Standard, Ver. 8.0]] |publisher=[[統一碼聯盟|Unicode, Inc.]] |access-date=8 February 2016 |archive-date=2022-02-15 |archive-url=https://web.archive.org/web/20220215111307/https://www.unicode.org/charts/PDF/U0370.pdf |dead-url=no }}</ref>
-[[sk:Omikron]]
+{{charmap
-[[sl:Omikron]]
+|039F|name1=Greek Capital Letter Omicron
-[[sr:Омикрон (слово)]]
+|03BF|name2=Greek Small Letter Omicron
-[[sv:Omikron]]
+|2C9E|name3=Coptic Capital Letter O
-[[th:โอไมครอน]]
+|2C9F|name4=Coptic Small Letter O
-[[tr:Omikron]]
+|map2=DOS Greek|map2char1=8E|map2char2=A6
-[[uk:Омікрон (літера)]]
+|map3=DOS Greek-2|map3char1=BE|map3char2=E9
-[[vep:Omikron]]
+|map4=Windows 1253|map4char1=CF|map4char2=EF
-[[war:Omicron]]
+}}
-[[wuu:Ο]]
-[[zh-yue:Ο]]
+* '''Mathematical Omicron'''<ref name="U1D400">{{cite web |url=https://www.unicode.org/charts/PDF/U1D400.pdf |title=Mathematical Alphanumeric Symbols (Range: 1D400–1D7FF) |year=2015 |work=[[Unicode|The Unicode Standard, Ver. 8.0]] |publisher=[[統一碼聯盟|Unicode, Inc.]] |access-date=8 February 2016 |archive-date=2021-10-16 |archive-url=https://web.archive.org/web/20211016104052/http://www.unicode.org/charts/PDF/U1D400.pdf |dead-url=no }}</ref>
+这些字符只作为数学符号使用。风格化的希腊文应使用正常的希腊字母进行编码，用标记和文本格式来表示文本风格。
+{{charmap
+|1D6B6|name1=Mathematical Bold<br />Capital Omicron
+|1D6D0|name2=Mathematical Bold<br />Small Omicron
+|1D6F0|name3=Mathematical Italic<br />Capital Omicron
+|1D70A|name4=Mathematical Italic<br />Small Omicron
+|1D72A|name5=Mathematical Bold Italic<br />Capital Omicron
+|1D744|name6=Mathematical Bold Italic<br />Small Omicron
+}}
+{{charmap
+|1D764|name1=Mathematical Sans-Serif<br />Bold Capital Omicron
+|1D77E|name2=Mathematical Sans-Serif<br />Bold Small Omicron
+|1D79E|name3=Mathematical Sans-Serif<br />Bold Italic Capital Omicron
+|1D7B8|name4=Mathematical Sans-Serif<br />Bold Italic Small Omicron
+}}
+== 说明性脚注 ==
+{{notelist}}
+==参考文献==
+{{Reflist}}
+== 外部链接 ==
+* {{Wiktionary-inline|Ο}}
+* {{Wiktionary-inline|ο}}
+[[Category:希腊字母]]
+[[Category:元音字母]]