: 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 Goats aside, the island is also known for its local LSD bread, which was outlawed in the 1950s, and is a popular tourist stop for sail boats and volcano aficionados, who can see nearby Stromboli’s constant eruptions. Amarachi Orie, CNN, 4 Apr. 2024 Harvard made headlines for firing professors who doled out LSD and psilocybin to students. Brendan Borrell, New York Times, 21 Mar. 2024 In 1968, the United States outlawed LSD and research projects were shut down or forced underground. Sandee Lamotte, CNN, 7 Mar. 2024 Duress played Ray, a criminal whom Pattinson’s Connie accidentally breaks out of a hospital and joins on a search for liquid LSD at an amusement park. Wesley Stenzel, EW.com, 27 Feb. 2024 The Wall Street Journal reported earlier this year that Musk — who has been locked in a close race with Jeff Bezos and Bernard Arnault for the title of richest person in the world — is an occasional user of cocaine, ecstasy, LSD, and mushrooms, among other drugs. William Gavin, Quartz, 21 Feb. 2024 The problem facing veterans in crisis mirrors the larger issue of psychedelic therapy access for civilians: Hundreds of stories are published daily trumpeting studies that show mushrooms, LSD, MDMA and other psychedelic substances may help treat mental illness. Robert Johnson, Rolling Stone, 21 Feb. 2024 Ceremonies with mushrooms, LSD, ayahuasca and toad Former US rugby player Anna Symonds says she was diagnosed with TBI about 10 years ago and has to take several different hormones that her body – notably her pituitary gland – is not making as a result of the head injuries. Amy Woodyatt, CNN, 19 Feb. 2024 Psychosis is most often associated with schizophrenia, bipolar disorder and severe depression, but sleep deprivation and prescription medications, as well as alcohol and drugs such cocaine, ecstasy, LSD, amphetamines and cannabis, can cause psychosis, the National Institute of Mental Health says. Katie Camero, USA TODAY, 31 Jan. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'LSD.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 22 Apr. 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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