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.

Origin:
l(anding) s(hip) d(eck)

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LSD

2
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.

Origin:
< German Lysergsäure-Diäthylamid lysergic acid diethylamide

L.S.D.

pounds, shillings, and pence.
Also, £.s.d., l.s.d.


Origin:
< Latin librae, solidī, dēnāriī

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
LSD
 
n
Informal name (as an illegal hallucinogen): acid lysergic acid diethylamide; a crystalline compound prepared from lysergic acid, used in experimental medicine and taken illegally as a hallucinogenic drug

L.S.D., £.s.d. or l.s.d.
 
abbreviation for
librae, solidi, denarii
 
[Latin: pounds, shillings, pence]
 
£.s.d., £.s.d. or l.s.d.
 
abbreviation for
 
[Latin: pounds, shillings, pence]
 
l.s.d., £.s.d. or l.s.d.
 
abbreviation for
 
[Latin: pounds, shillings, pence]

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Word Origin & History

LSD
"lysergic acid diethylamide," 1950, from Ger. "Lysergsäure-diäthylamid" (abbreviated LSD in a Swiss journal from 1947). Lysergic (1934) is formed from the lys in hydrolysis + first syllable of ergot + -ic.

l.s.d.
abbreviation of British currency units, from L. librae, soldi, denarii, Roman equivalent of "pounds, shillings, pence."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
LSD   (ěl'ěs-dē')  Pronunciation Key 
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

LSD definition


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.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Slang Dictionary

LSD definition


  1. n.
    lysergic acid diethylamide, a hallucinogenic drug. (Initialism. Drugs. A mainstay of the 1960s and 1970s drug culture.) : LSD isn't the problem it used to be, but it's far from gone.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
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American Heritage
Abbreviations & Acronyms
LSD
  1. least significant digit

  2. lysergic acid diethylamide

L.S.D.
pounds, shillings, and pence
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences for lsd
They also revealed that at least one subject had died after administration of lsd.
He frequently used lsd, pills, and cannabis and was a heavy drinker.
Synonyms
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