Definition of LSD in English:

LSD

Syllabification: LSD

noun

A synthetic crystalline compound, lysergic acid diethylamide, that is a potent hallucinogenic drug.
  • Chemical formula: C20H26N2O

Origin

mid 20th century: abbreviation.

Definition of LSD in:

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Word of the day internecine
Pronunciation: ˌɪntəˈniːsʌɪn
adjective
destructive to both sides in a conflict