Video shows what lysergic acid means. An organic compound, 6-methyl-9,10-didehydro-ergoline-8-carboxylic acid, derived from an alkaloid found in ergot; its amide derivatives are widely used as pharmaceuticals and as hallucinogenic drugs (LSD).. Lysergic acid Meaning. How to pronounce, definition audio dictionary. How to say lysergic acid. Powered by MaryTTS, Wiktionary