lysergic acid

[ lahy-sur-jik, li- ]
/ laɪˈsɜr dʒɪk, lɪ- /

noun Chemistry.

a crystalline solid, C16H16N2O2, obtained from ergot or synthesized: used in the synthesis of LSD.



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Origin of lysergic acid

First recorded in 1930–35; lys- + erg(ot) + -ic Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for lysergic acid

lysergic acid
/ (lɪˈsɜːdʒɪk, laɪ-) /


a crystalline compound with a polycyclic molecular structure: used in medical research. Formula C 16 H 16 N 2 O 2

Word Origin for lysergic acid

C20: from (hydro) lys (is) + erg (ot) + -ic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for lysergic acid

lysergic acid
[ lĭ-sûrjĭk, lī- ]


A crystalline alkaloid derived from ergot and used in medical research as a psychotomimetic agent.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for lysergic acid

lysergic acid
[ lĭ-sûrjĭk, lī- ]

A crystalline alkaloid that is a major constituent of ergot. It is used in medical research to induce hallucinations, delusions, and other symptoms of psychosis. The drug LSD is a derivative of lysergic acid. Chemical formula: C16H16N2O2.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.