LSD

noun

ˌel-(ˌ)es-ˈdē 

: 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

Cannabis is currently listed in Schedule I of the CSA, along with other substances like heroin, ecstasy, and LSD. —Dario Sabaghi, Forbes.com, 17 July 2025

The list includes drugs such as heroin, cocaine and LSD. —Bart Jansen, USA Today, 17 July 2025

Nineteen thousand doses of LSD as well as fentanyl, cocaine, ecstasy and other drugs were seized. —Kevin Grasha, The Enquirer, 2 July 2025

She was arrested on May 4, 2023, when authorities searched her residence and vehicle, reportedly finding about 390 grams of crystal meth and unspecified quantities of crack cocaine, LSD and prescription pills, according to officials. —Justin Muszynski, Hartford Courant, 27 June 2025

Word History

Etymology

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

First Known Use

1950, in the meaning defined above

Kids Definition

LSD

noun

ˌel-ˌes-ˈdē 

: 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

ˌel-ˌes-ˈdē 

: 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