[koh-luh-nes-tuh-reys, -reyz, kol-uh-]

noun Biochemistry.

an enzyme, found especially in the heart, brain, and blood, that hydrolyzes acetylcholine to acetic acid and choline.

Origin of cholinesterase

First recorded in 1930–35; choline + esterase Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for cholinesterase



an enzyme that hydrolyses acetylcholine to choline and acetic acid
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

cholinesterase in Medicine


[kō′lə-nĕstə-rās′, -rāz′]


An enzyme that catalyzes the hydrolysis of choline esters chiefly at nerve terminals, where it hydrolyzes and inactivates acetylcholine.acetylcholinesterase
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.