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English definition of “LSD”

LSD

noun [U] uk   /ˌel.esˈdiː/ (slang acid) us  
an illegal drug that causes people who use it to see the world differently from the way it really is or to see things that do not really existSpecific types of drugDrugs - general wordsSpecific medicines and drugs
(Definition of LSD from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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