Definition of hormone
1 : a product of living cells that circulates in body fluids (such as blood) or sap and produces a specific often stimulatory effect on the activity of cells usually remote from its point of origin; also : a synthetic substance that acts like a hormone
2 : sex hormone
hormonelikeplay \ˈhȯr-ˌmōn-ˌlīk\ adjective
Recent Examples of hormone from the Web
Pregnancy can change hormone levels and blood clotting factors, as well as decrease blood flow because of pressure on uterine veins, according to the American Congress of Obstetricians and Gynecologists.
Butorphanol, an opioid analgesic, and melengesterol acetate, a synthetic hormone not approved for use in poultry, were also found.
INSULIN Insulin is a hormone released by the pancreas gland when carbs are consumed.
The group explained that triclosan and triclocarban are endocrine disruptors that may affect hormone cycles and development.
That sensitivity may spur the growth of boys during adolescence, when their bodies are flooded with growth hormone.
Goal is Cure Roche officials welcomed its combo results, saying women with higher-risk tumors, including those that had spread to the lymph nodes or wouldn’t respond to hormone therapy, derived the most benefit.
The spa's website lists benefits including hormone production to maintain uterine health and menstrual cycle regulation.
Occasionally a drug is an animal product itself, such as the anti-clotting injection heparin or the female hormone product Premarin.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hormone'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
HORMONE Defined for English Language Learners
Definition of hormone for English Language Learners
: a natural substance that is produced in the body and that influences the way the body grows or develops
HORMONE Defined for Kids
Definition of hormone for Students
: any of various chemical substances produced by body cells and released especially into the blood and having a specific effect on cells or organs of the body usually at a distance from the place of origin
Medical Definition of hormone
1a: a product of living cells that circulates in body fluids (as blood) or sap and produces a specific often stimulatory effect on the activity of cells usually a distance from its point of synthesis Some people develop insulin resistance, a condition in which response to the hormone is muted and the body must produce excess insulin to maintain healthy blood-glucose concentrations.—Ben Harder, Science News, 18 May 2002b: a synthetic substance that acts like a hormone
2: sex hormone I discovered I had the classic signs of perimenopause, the prelude to “the change” when hormones yo-yo before menstrual periods cease altogether …—Beth Witrogen McLeod, Cooking Light, April 2000
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