LD

LD may refer to:

Arts and entertainment

Lorraine "L.D." Delacorte, a character on the TV series Degrassi
Larry David, sometimes referred to as L.D. on the television show Curb Your Enthusiasm
Latin Disciples, a fictional gang in television series Day Break
Living Dangerously, an Extreme Champion Wrestling pay-per-view event (ECW PPV)
Low-definition television (LDTV)
"-LD", a United States call sign suffix signifying a low-power digital television station

Liberal democracy, a form of government based on rule of the people (democracy) tempered by the rule of law and natural rights (liberalism)
Lincoln–Douglas debate, a form of debate
Liberal Democrats (UK), a UK political party
Lord, a peer of the realm in the United Kingdom

Lilian day, a variant of the Julian day
Lunar distance (astronomy), the distance between the Earth and the Moon, used a general measure of distance

Lactate dehydrogenase, an enzyme in plants and animals
Lateral dorsal nucleus of thalamus, an anatomic structure of the brain
Lethal dose, an indication of the lethal toxicity of a given substance or type of radiation
Licensed Dietitian
Linkage disequilibrium, in genetics, when alleles occur together more often than they would by chance

ld, an instruction on a Z80 CPU
ld (Unix), the linker command on Unix and Unix-like systems
Laser diode, semiconductor laser-emitting device
LaserDisc, an obsolete optical disc video/data format and predecessor to DVD
Levenshtein distance, a string metric for measuring the difference between two sequences.
Line Dubbed, a term for unlicensed copies of films with an audio track, which has been ripped from the line out connection of a projector
Linked data, a method of publishing structured data so that it can be interlinked and become more useful

Ladder diagram (disambiguation), with various meanings
D/L nomenclature, used in naming chemical compounds
Linz-Donawitz process, a widely-used process in Basic oxygen steelmaking
Listening device, used in covert investigations
Binary logarithm, $\mathrm {ld} (x)=\log _{2}(x)$ , from the Latin logarithmus dualis
London dispersion force, weak intermolecular forces
Laser designator, used by the military for targeting
Language Development, the changes that take place in language, speech & communication in the context of children's development

LD (cigarette), a brand of cigarette
Learning disability, a condition that can impair learning through standard methods
Lighting designer, a person in charge of lighting in theatre
Lincoln–Douglas debate format
Line drive, in baseball
Long-distance relationship
Lucid dreaming, a dream in which one is conscious of dreaming as it is happening
Ludum Dare, a game development competition