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hormone

A chemical messenger made by a gland or organ and carried in the blood to act on cells elsewhere in the body.

HOR-mohn noun

What it means

Hormones control growth, metabolism, fluid balance, stress responses, reproduction and more. Examples are insulinIN-suh-linA hormone made by the pancreas that lets the body's cells take in glucose, also made as a medicine.Full entry from the pancreas, cortisolKOR-tih-solA steroid hormone made by the adrenal glands that helps control blood sugar, blood pressure, stress and inflammation.Full entry from the adrenal glands, thyroid hormone, estrogenES-truh-jenA female sex hormone, made mainly by the ovaries, and the group of drugs that act like it.Full entry and antidiuretic hormonean-tee-dy-yoo-RET-ik HOR-mohnA hormone from the pituitary gland that tells the kidneys to hold on to water, making the urine more concentrated.anti- againstdiuretic making urineFull entry . The endocrine system is the network of glands that makes them, and feedback loops keep their levels in balance.

At a glance

Spanishhormona
Also writtenhormones, hormone's, hormonal

Related terms

insulin

A hormone made by the pancreas that lets the body's cells take in glucose, also made as a medicine.

hypothalamus

A small area at the base of the brain that controls body temperature, hunger, thirst, sleep and many hormones.

cortisol

A steroid hormone made by the adrenal glands that helps control blood sugar, blood pressure, stress and inflammation.

thyroid-stimulating hormone

A hormone from the pituitary gland that tells the thyroid to make thyroid hormone; its blood level is the main thyroid test.

pituitary gland

A gland the size of a pea, hanging below the brain, whose hormones control many other glands.

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