Pronunciation: (u-sēt"l-kō'lēn, u-set"-, as"i-tl-), [key]
1. Biochem.the acetic acid ester of choline, C7H17NO3, released and hydrolyzed during nerve conduction and causing muscle action by transmitting nerve impulses across synapses.
2. Pharm.this substance used in its chloride form in eye surgery. Abbr.: ACh
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.