LSD

noun \ ˌel-(ˌ)es-ˈdē \

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

Origin and Etymology of lsd

German Lysergsäure-Diäthylamid lysergic acid diethylamide


LSD Defined for English Language Learners

LSD

noun

Definition of LSD for English Language Learners

  • : an illegal drug that causes people to see and hear things that do not really exist


LSD Defined for Kids

LSD

noun \ ˌel-ˌes-ˈdē \

Definition of LSD for Students

:a dangerous drug that causes hallucinations

Medical Dictionary

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


Seen and Heard

What made you want to look up LSD? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to speak evil of

Get Word of the Day daily email!

Test Your Vocabulary

Forms of Government Quiz

  • knupfer-painting-solon-before-croesus
  • A gerontocracy is rule by:
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!