LSD

noun

\ ˌel-(ˌ)es-ˈdē

How to pronounce LSD (audio)

\

Definition of LSD

: 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

Learn More About LSD

Dictionary Entries Near LSD

LSD

Statistics for LSD

Cite this Entry

“LSD.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/LSD. Accessed 4 Jul. 2022.

Style: MLA

MLA

Chicago

APA

Merriam-Webster Check Mark Icon

More Definitions for LSD

LSD

noun

\ ˌel-ˌes-ˈdē

\

Kids Definition of LSD

: a dangerous drug that causes hallucinations

LSD

noun

\ ˌel-ˌes-ˈdē

\

Medical Definition of LSD

: 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

WORD OF THE DAY

Yankee

Listen to the pronunciation of Yankee

See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

Great Words for Scrabble

Which of the following Q-without-U words means the number five in cards or dice?

Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ

Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ