LSD

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abbreviation Pharmacology.

a crystalline solid, C20H25N3O, the diethyl amide of lysergic acid, a powerful psychedelic drug that produces temporary hallucinations and a schizophrenic psychotic state.

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His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Origin of LSD

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

Words nearby LSD

LRBM, LRSC, LRT, LS, LSAT, LSD, LSE, L-shaped curve , L-shell, LSI, L sill

Other definitions for LSD (2 of 4)

LSD²

abbreviation; noun, plural LSDsU.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 of LSD

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

Other definitions for LSD (3 of 4)

LSD³

abbreviation

least significant digit.

Other definitions for LSD (4 of 4)

L.S.D.

or £.s.d., l.s.d.

abbreviation

pounds, shillings, and pence.

Origin of L.S.D.

FromLatin lībrae “pounds (sterling),” see libra¹, pound²; solidī , see solidus¹; dēnāriī see denarius

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use LSD in a sentence

The zoologist at University of Tubingen in Germany gave a bunch of spiders some LSD.
Zebra Finches, Dolphins, Elephants, and More Animals Under the Influence|Bill Schulz|December 31, 2014|DAILY BEAST
And there it was before my eyes—a real trip in those brain-buzzing LSD colors.
The Sexy Dream of the 747|Clive Irving|October 26, 2014|DAILY BEAST
At the time they made LSD illegal in 1970—and by extension other psychedelics—MDMA was not included.
Psychedelics Are Ready for a Comeback|Abby Haglage|September 8, 2014|DAILY BEAST
LSD, an illicit drug with a serious stigma, was once the darling of the psychotherapy world.
Psychedelics Are Ready for a Comeback|Abby Haglage|September 8, 2014|DAILY BEAST

But with LSD, because it was countercultural, and because it was used as an experimental drug, it was not marketed properly.
Frances McDormand on 'Olive Kitteridge,' Dropping LSD, and Her Beef With FX's 'Fargo'|Marlow Stern|September 3, 2014|DAILY BEAST
It is common to have a bad psychological reaction to LSD, mescaline, and psilocybin.
What Works: Schools Without Drugs|United States Department of Education
Lysergic acid (LSD), mescaline, and psilocybin cause illusions and hallucinations.
What Works: Schools Without Drugs|United States Department of Education

British Dictionary definitions for LSD (1 of 2)

LSD

noun

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

British Dictionary definitions for LSD (2 of 2)

L.S.D.

.s.d. or l.s.d.

abbreviation for (in Britain, esp formerly)

librae, solidi, denarii

Word Origin for L.S.D.

Latin: pounds, shillings, pence

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for LSD

LSD

[ ĕl′ĕs-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.

Cultural definitions for LSD

LSD

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.