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hormone
[ hawr-mohn ]
noun
- 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.
- Pharmacology. a synthetic substance used in medicine to act like such a compound when introduced into the body.
- Botany. Also called phytohormone. any of various plant compounds, as auxin or gibberellin, that control growth and differentiation of plant tissue.
hormone
/ ˈhɔːməʊn /
noun
- a chemical substance produced in an endocrine gland and transported in the blood to a certain tissue, on which it exerts a specific effect
- an organic compound produced by a plant that is essential for growth
- any synthetic substance having the same effects
hormone
/ hôr′mōn′ /
- A chemical substance secreted by an endocrine gland or group of endocrine cells that acts to control or regulate specific physiological processes, including growth, metabolism, and reproduction. Most hormones are secreted by endocrine cells in one part of the body and then transported by the blood to their target site of action in another part, though some hormones act only in the region in which they are secreted. Many of the principal hormones of vertebrates, such as growth hormone and thyrotropin, are secreted by the pituitary gland, which is in turn regulated by neurohormone secretions of the hypothalamus. Hormones also include the endorphins, androgens, and estrogens.
- See more at endocrine gland
- A substance that is synthesized by a plant part and acts to control or regulate the growth and development of the plant. The action and effectiveness of a hormone can depend on the hormone's chemical structure, its amount in relation to other hormones that have competing or opposing effects, and the ways in which it interacts with chemical receptors in various plant parts. Auxins, cytokinins, gibberellins, abscisic acid, and ethylene are plant hormones.
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Derived Forms
- horˈmonal, adjective
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Other Words From
- hor·monal hor·mon·ic [hawr-, mon, -ik, -, moh, -nik], adjective
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Word History and Origins
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Word History and Origins
Origin of hormone1
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A Closer Look
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Example Sentences
You have to acknowledge your age and position in life, for me quite a lot of those emotionally fueled songs were hormone songs.
He was prescribed a course of hormone pills that caused him to grow breasts and rendered him impotent.
McAndrews agreed that the androgenic hormone pill would be problematic for those with a genetic propensity for ADA.
What if they were to measure body composition or hormone levels or metabolic rate?
The HPA axis is a circuit between your brain, your hormone glands, and the rest of your body.
It is simply all the endocrine or hormone-producing organs organized into a balanced chemical system—adjusted to each other.
This is unquestionably to be interpreted as a case of hormone action.
Our modern conception of hormone action shows certain resemblances with this theory.
Doubtless plants produce in their leaves a hormone which directs certain enzymes that conduct wound repair by cell division.
Yes, sir; he was given 300 milligrams of hydrocortisone which is an adrenal hormone.
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