Definition of Hormone

Hor´mone   Pronunciation: hôr´mōn
n.1.(Physiological Chem.) A chemical substance formed in one organ and carried in the circulation to another organ on which it exerts a specific effect on cells at a distance from the producing cells; thus, pituitary hormones produced in the brain may have effects on cells in distant parts of the body..
2.(Physiological Chem.) a chemical substance, whether natural or synthetic, that functions like a hormone in a living organism. Thus, synthetic steroid hormones may be more effective than their natural counterparts.
3.(Bot.) A substance that controls growth rate or differentiation in plants; also called phytohormone. The most well-known are the auxins that stimulate growth at the growing tips of plants, and control root formation and the dropping of leaves; and the gibberellins, which are used in agriculture to promote plant growth.


Related Words

Allen-Doisy hormone, adjuvant, adrenosterone, androgen, androsterone, autacoid, bile, carminative, chalone, cholecystokinin, chondrotrophic hormone, corticosterone, counterirritant, dehydrocorticosterone, digestive secretion, emmenagogue, endocrine, expectorant, gall, gastric juice, insulin, intestinal juice, maturative, mucus, pancreatic juice, progesterone, prostatic fluid, rheum, salivary secretion, semen, sperm, tears, thyroxin, vasodilator, vitamin

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Hordock
Hore
Horehound
Horizon
Horizontal
Horizontal drill
Horizontal engine
Horizontal fire
Horizontal force
Horizontal line
Horizontal parallax
Horizontal plane
Horizontal projection
Horizontal range
Horizontal training
Horizontal water wheel
Horizontality
Horizontally
Hormogonium
Hormonal
Horn
Horn block
Horn distemper
Horn drum
Horn lead
Horn maker
Horn mercury
Horn of a dilemma
horn plate
Horn poppy
Horn pout
Horn pox
Horn quicksilver
Horn shell
Horn silver
Horn slate
Horn-mad
Hornbeak
Hornbeam
Hornbill
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