hormone — Biochemistry. any of various internally secreted compounds, as insulin or thyroxine, formed in endocrine glands, that affect the functions of specifically receptive organs or tissues when transported to them by the body fluids.
hormonal — Biochemistry. any of various internally secreted compounds, as insulin or thyroxine, formed in endocrine glands, that affect the functions of specifically receptive organs or tissues when transported to them by the body fluids.
pheromone — any chemical substance released by an animal that serves to influence the physiology or behavior of other members of the same species.
pheromones — any chemical substance released by an animal that serves to influence the physiology or behavior of other members of the same species.
