[uh-seet-l-koh-luh-nes-tuh-reys, -reyz, uh-set-, as-i-tl-]

noun Biochemistry.

an enzyme that hydrolyzes the neurotransmitter acetylcholine: its action is blocked by nerve gases and certain drugs.

Origin of acetylcholinesterase

First recorded in 1945–50; acetylcholine + esterase Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for acetylcholinesterase



an enzyme in nerve cells that is responsible for the destruction of acetylcholine and thus for switching off excitation of the nerve
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

acetylcholinesterase in Medicine


[ə-sēt′l-kō′lə-nĕstə-rās′, -rāz′]


The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.