(biochemistry) An amine, C₅H₉N₃, formed by decarboxylation of histidine, that causes dilatation of capillaries, contraction of smooth muscle, and stimulation of gastric acid secretion; it is released during allergic reactions.

plural of histamine

Dated form of histamine.

Relating to or containing histamines

plural of histamin

(biochemistry) A widely occurring flavoprotein enzyme that oxidizes histamine and various diamines.

plural of histaminase

Of or pertaining to the effects of histamine at a receptor in an affected tissue.

(biochemistry) Modification by reaction with histamine