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LSD
noun
: 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
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%.
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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
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Word History
Etymology
borrowed from German, from Lysergsäure-Diäthylamid "lysergic acid diethylamide"
First Known Use
1950, in the meaning defined above
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
LSD
noun
: 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
LSD
noun
: 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
More from Merriam-Webster on LSD
Britannica.com: Encyclopedia article about LSD
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