acetylcholinesterase

noun

ace·​tyl·​cho·​lin·​es·​ter·​ase ə-ˌse-tᵊl-ˌkō-lə-ˈne-stə-ˌrās 

-ˌrāz

: an enzyme that occurs chiefly in cholinergic nerve endings and promotes the hydrolysis of acetylcholine : cholinesterase sense 1

Note: Acetylcholinesterase is also found in red blood cells, where its function is unknown.

Examples of acetylcholinesterase in a Sentence

Recent Examples on the Web

This is where the enzyme acetylcholinesterase comes in. —Sam Pellock, The Conversation, 13 Feb. 2025

There is also evidence that wild lettuce can aggravate narrow-angle glaucoma, which is influenced by acetylcholinesterase inhibitors. —Verywell Health, 14 Feb. 2023

Wild lettuce appears to be a robust acetylcholinesterase inhibitor. —Verywell Health, 14 Feb. 2023

Steroidal alkaloids such as solanine have atropine-like effects on the nervous system inhibiting the enzyme acetylcholinesterase. —Chris Smith, BGR, 28 July 2022

These drugs, called acetylcholinesterase inhibitors, can help treat neurodegenerative conditions such as Alzheimer’s. —Rebecca Sohn, Scientific American, 21 Apr. 2022

Anyone up for a heated debate about acetylcholinesterase inhibitors? —Paul Cappiello, The Courier-Journal, 17 Jan. 2020

The medical team sought to boost the pair’s production of acetylcholinesterase, an enzyme that is vital for the brain to communicate with muscles and that can be blocked by nerve agents. —William Booth, Washington Post, 29 May 2018

Toxicologists say that the first days after a poisoning are a crucial threshold for survival, as the body struggles to resynthesize an enzyme, acetylcholinesterase, which is inhibited by nerve agents. —Ellen Barry, New York Times, 7 July 2018

Word History

Etymology

acetyl(choline) + cholinesterase

First Known Use

1937, in the meaning defined above

Rhymes for acetylcholinesterase

• ablaze
• airways
• allays
• always
• amaze
• anglaise
• appraise
• archways
• arrays
• ashtrays
• assays
• ballets

Medical Definition

acetylcholinesterase

noun

ace·​tyl·​cho·​lin·​es·​ter·​ase -ˌkō-lə-ˈnes-tə-ˌrās, -ˌrāz 

: an enzyme that occurs chiefly in cholinergic nerve endings and promotes the hydrolysis of acetylcholine : cholinesterase sense 1

The therapeutic rationale is that inhibition of acetylcholinesterase enhances sympathetic ganglionic neurotransmission and that the effect is maximal when the patient is upright, since sympathetic-nerve traffic is greatest in this position.

—Roy Freeman, The New England Journal of Medicine

Tacrine is a potent, centrally active, reversible acetylcholinesterase inhibitor that prevents the degradation of endogenously released acetylcholine.

—Margaret J. Knapp et al., The Journal of the American Medical Association

Note: Acetylcholinesterase is also found in red blood cells where its function there is unknown.