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

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

{{en}}
• (physiology) Any substance, produced by one tissue and conveyed by the bloodstream to another to effect physiological activity
  
• (chemistry) A synthetic compound with the same activity
  
• Any similar substance in plants