Medical Dictionary
histamine
noun his·ta·mine \ˈhis-tə-ˌmēn, -mən\
Medical Definition of HISTAMINE
: a compound C5H9N3 especially of mammalian tissues that causes dilatation of capillaries, contraction of smooth muscle, and stimulation of gastric acid secretion, that is released during allergic reactions, and that is formed by decarboxylation of histidine
—his·ta·min·ic \ˌhis-tə-ˈmin-ik\ adjective
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