Ø (disambiguation)

For the Underoath album, see Ø (Disambiguation).

Ø (and ø) is a Scandinavian vowel letter.

Ø, ∅ etc may also refer to:

Language

• Close-mid front rounded vowel (IPA: ø)
• Unvoiced bilabial fricative (IPA: ɸ)
• Unvoiced dental fricative (IPA: θ)
• Zero (linguistics) (∅)
• Ef (Cyrillic) (Ф and ф), a Cyrillic letter, corresponding to "f" or "ph"
• Phi (Φ and φ), a Greek letter, corresponding to "f" or "ph"
• Theta (Θ and θ), a Greek letter, corresponding to "th"
• Fita (Ѳ and ѳ), an Old Cyrillic letter, corresponding to "f" and transliterating Greek theta
• Oe (Cyrillic) (Ө and ө), Cyrillic barred O, representing an open-mid front rounded vowel in some Turkic and Mongolic languages

Science, technology and engineering

• Slashed zero (0̸), a representation of the number 0 (zero) to distinguish it from the letter O
• Diameter (⌀)
• Plimsoll line (o), the line where the hull of a ship meets the surface of the water
• Standard state (o), in chemistry
• Empty set ($\varnothing$), in mathematical set theory

Other uses

• Ø, Denmark, a piece of land in Jutland, Denmark
• Half-diminished seventh chord (^ø), in music
• Ø, the solo identity of Finnish musician Mika Vainio of electronic music band Pan Sonic

See also

• Null (disambiguation)
• Null symbol (disambiguation)