Definition of lysergic acid in US English:

lysergic acid


  • A crystalline compound prepared from natural ergot alkaloids or synthetically, from which the drug LSD (lysergic acid diethylamide) can be made.

    A tetracyclic acid; chemical formula: C₁₆H₁₆N₂O₂

    • ‘Club drugs are favored over other recreational drugs, such as marijuana, lysergic acid diethylamide, methamphetamine, and opiates, because they are believed to enhance social interaction.’
    • ‘Among these were marijuana, a revival of cocaine sniffing, and experimentation with lysergic acid diethylamide, a powerful hallucinogen.’
    • ‘This is an acid amide derivative of lysergic acid.’
    • ‘In 1943, the drug lysergic acid diethylamide was synthesized by a Swiss chemist.’
    • ‘A synthetic variation of this compound called lysergic acid diethylamide is a powerful hallucinogen called LSD.’


1930s: lysergic from (hydro)lys(is) + erg(ot) + -ic.


lysergic acid