: a semisynthetic illicit organic compound C20H25N3O derived from ergot that induces extreme sensory distortions, altered perceptions of reality, and intense emotional states, that may also produce delusions or paranoia, and that may sometimes cause panic reactions in response to the effects experienced

called also lysergic acid diethylamide

Examples of LSD in a Sentence

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The press release also said that the operation led to the seizure of a large amount of drugs such as marijuana, LSD, cocaine, psilocybin mushrooms, Adderall, and Xanax. Fernando Cervantes Jr., USA TODAY, 7 Dec. 2024 Childbirth, or going to war, or taking LSD, could be considered a transformative experience. Hannah Jocelyn, The New Yorker, 6 Dec. 2024 Over the course of 206 pages, Gibson tests MDMA in Hawaii and Arizona; LSD in Big Sur; psilocybin in Belize; and ayahuasca in Peru. Brian Steinberg, Variety, 3 Dec. 2024 In addition to the Boies case, the Drug Enforcement Administration has scheduled a hearing on the recommendation to reschedule marijuana from Schedule I, the same category as heroin and LSD, to Schedule III that same month. Will Yakowicz, Forbes, 6 Nov. 2024 See all Example Sentences for LSD 

Word History

Etymology

borrowed from German, from Lysergsäure-Diäthylamid "lysergic acid diethylamide"

First Known Use

1950, in the meaning defined above

Time Traveler
The first known use of LSD was in 1950

Dictionary Entries Near LSD

Cite this Entry

“LSD.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/LSD. Accessed 23 Dec. 2024.

Kids Definition

: an illegal drug that causes abnormal sensations, extreme and changeable states of emotion, unnatural changes in the way time and space are experienced, and hallucinations and that may sometimes cause panic in response to the effects experienced

Medical Definition

: a semisynthetic illicit organic compound C20H25N3O derived from ergot that induces extreme sensory distortions, altered perceptions of reality, and intense emotional states, that may also produce delusions or paranoia, and that may sometimes cause panic reactions in response to the effects experienced

called also acid, lysergic acid diethylamide, lysergide

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