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A substance, C7H17NO3, that is derived from choline and is released at the ends of nerve fibers in the somatic and parasympathetic nervous systems, where it mediates the transmission of nerve impulses.
(Biochemistry) a chemical substance secreted at the ends of many nerve fibres, esp in the autonomic nervous system, and responsible for the transmission of nervous impulses. Formula: CH3CO2(CH2)2N(CH3)3+
a•ce•tyl•cho•line(əˌsit lˈkoʊ lin, əˌsɛt-)
a short-acting neurotransmitter, widely distributed in the body, that functions as a nervous system stimulant, a vasodilator, and a cardiac depressant.Abbr.: ACh
a•ce`tyl•cho•lin′ic (-ˈlɪn ɪk) adj.
A neurotransmitter that triggers activity by muscles or secretory glands.