LSD

¹

abbreviation for

, Pharmacology.

1. a crystalline solid, C 20 H 25 N 3 O, the diethyl amide of lysergic acid, a powerful psychedelic drug that produces temporary hallucinations and a schizophrenic psychotic state.

LSD

²

abbreviation for

, U.S. Navy.

, plural LSDs

1. a seagoing, amphibious ship capable of carrying and launching assault landing craft from a large, inner compartment that can be flooded, and of making emergency repairs at sea to smaller ships.

LSD

³

abbreviation for

1. least significant digit ( def ).

L.S.D.

⁴

or £.s.d., l.s.d.

abbreviation for

1. pounds, shillings, and pence.

L.S.D.

¹

abbreviation for

1. librae, solidi, denarii

LSD

²

noun

1. lysergic acid diethylamide; a crystalline compound prepared from lysergic acid, used in experimental medicine and taken illegally as a hallucinogenic drug Informal name (as an illegal hallucinogen)acid

LSD

/ ĕl′ĕs-dē′ /

1. Short for lysergic acid diethylamide. A crystalline compound that is a synthetic derivative of lysergic acid. It is used as a powerful hallucinogenic drug. Chemical formula: C 20 H 25 N 3 O.

LSD

1. A drug, lysergic acid diethylamide, that produces hallucinations similar to those of a psychosis . Persons on LSD “trips,” which may last for many hours, undergo distortions of their perceptions of space and time and may lose all contact with reality.

Word History and Origins

Origin of LSD¹

First recorded in 1945–50; abbreviaion of German Lysergsäure-Diäthylamid “lysergic acid diethylamide”

Origin of LSD²

First recorded in 1940–45; abbreviation of l(anding), s(hip), d(ock)

Origin of LSD³

From Latin lībrae “pounds (sterling),” libra ¹( def ), pound ²( def ); solidī , solidus ¹( def ); dēnāriī denarius ( def )

Word History and Origins

Origin of LSD¹

Latin: pounds, shillings, pence