acetylcholine

(ă-set″ĭl-kō′lēn″ )

[ acetyl + choline ]
ABBR: ACh An ester of choline that is the neurotransmitter at somatic neuromuscular junctions, the entire parasympathetic nervous system, sympathetic preganglionic fibers (cholinergic fibers), and at some synapses in the central nervous system. It is inactivated by the enzyme cholinesterase.
SEE: cholinergic fiber

acetylcholine chloride

A salt solution of acetylcholine used in irrigation of the iris to produce contraction of the pupil after cataract surgery. The sterile solution is instilled in the anterior chamber of the eye before suturing.