LSD

1.
U.S. Navy. 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.
1.
Pharmacology. 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.
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.
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pounds, shillings, and pence.
noun
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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
abbreviation (in Britain, esp formerly)
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librae, solidi, denarii

“lysergic acid diethylamide,” 1950, from German “Lysergsäure-diäthylamid” (abbreviated LSD in a Swiss journal from 1947). See lysergic. L.s.d. as the abbreviation of “pounds, shillings, and pence” is recorded from 1853.

abbreviation of British currency units, from Latin librae, soldi, denarii, Roman equivalent of “pounds, shillings, pence.”

LSD (ěl’ěs-dē’)
n.
Lysergic acid diethylamide; a crystalline compound derived from lysergic acid and used as a powerful hallucinogenic drug. Also called acid, lysergide.
LSD
(ěl’ěs-dē’)
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: C20H25N3O.

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.

noun

Lysergic acid diethylamide, a hallucinogenic drug; acid: There is no rite of passage, such as smoking pot or tripping with LSD

[1960s+ Narcotics; found as a chemical abbreviation by 1947 in a Swiss journal]
1.
least significant digit
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lysergic acid diethylamide
pounds, shillings, and pence