: 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

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Author Tom Robbins, whose novels read like a hit of literary LSD, filled with fantastical characters, manic metaphors and counterculture whimsy, died on Sunday. Bill Trott, USA TODAY, 11 Feb. 2025 Those three drugs alone have made up over 93% of seizures in recent years, while ecstasy, fentanyl, heroin, ketamine, LSD and methamphetamine make up the majority of the remaining 7%. Kate Linderman, Miami Herald, 6 Feb. 2025 Why Bill Gates Is Telling All About Life Before His Billions, from Trying LSD to Being Put in Therapy by His Parents (Exclusive) As for his practical education, first came alcohol. Maria Pasquini, People.com, 31 Jan. 2025 These warriors may have used small spoons — dozens of which have been discovered attached to Barbarian belts — to ingest or measure magic mushrooms, an organic precursor for LSD or other substances. Joshua Rapp Learn, Discover Magazine, 30 Jan. 2025 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 21 Feb. 2025.

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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