: 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 The two reportedly met up twice, and Shepard paid the girl with cash and the hallucinogen LSD, according to police. Nate Gartrell, The Mercury News, 17 May 2024 Eventually all those instruments gave way to visuals that were more abstract — along with a few random shots of downhill LSD skiing — before landing firmly in the Milky Way. Chris Willman, Variety, 17 May 2024 Notably, other Schedule I drugs that fall under that umbrella include heroin and LSD, according to the DEA. Francisco Velasquez, Quartz, 16 May 2024 Inside lay a bundle of 40 sheets wrapped in a container of gold foil affixed with another image of the mouse, this time accompanied by the word ‘Sandoz’ – alerting the discerning buyer that the batch was most likely made from LSD synthesised by the original Swiss sorcerers. Peter Rubin, Longreads, 14 May 2024 Traditional hurdles to studying cannabis Since the Controlled Substance Act was passed in 1970, the federal government has designated cannabis as a Schedule I substance, along with other drugs such as heroin and LSD. Kevin F. Boehnke, The Conversation, 10 May 2024 Currently, cannabis is categorized next to heroin, methaqualone (Quaaludes), LSD and other substances in the Schedule I category, which also means the substances have a high abuse potential. Julia Marnin, Miami Herald, 10 May 2024 Anderson, a volunteer at the festival location, was allegedly high on multiple drugs, including PCP, LSD, ketamine, mushrooms and ecstasy, the sheriff's office said. Elizabeth Pritchett, Fox News, 10 May 2024 But there are signs the FDA is getting closer to downgrading that status for psilocybin, LSD and MDMA. Renée Reizman, Los Angeles Times, 8 May 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 28 May. 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

More from Merriam-Webster on LSD

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