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#, where "#" represents the percentage of test organisms killed by a specific dosage
Licensed Dietician
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 conversion process in steelmaking
Listening device, used in covert investigations
Binary logarithm, ${\mathrm {ld}}(x)=\log _{2}(x)$ , from the Latin logarithmus dualis
London dispersion forces, weak intermolecular forces

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