Category:Hormone

Hor"mone (hôr"mon), n. [From Gr. "orma`ein to excite.] (Physiol. Chem.)

Defn: A chemical substance formed in one organ and carried in the circulation to another organ on which it exerts a stimulating effect; thus, according to Starling, the gastric glands are stimulated by a hormone from the pyloric mucous membrane.