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

Examples of hormone in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The cancer had spread to his bones, and it was labeled as hormone-sensitive. Dr. Jamin Brahmbhatt, CNN Money, 23 July 2026 The protein-rich food contains vitamins, minerals, cholesterol-fighting lecithin, and hormone-balancing phytoestrogens. Alessandra Signorelli, Vogue, 23 July 2026 Peptides are the building blocks of more complex proteins, triggering hormones inside the body needed for growth, metabolism and healing. Matthew Perrone, Fortune, 23 July 2026 Movement helps regulate stress hormones, can reduce feelings of stress and anxiety, may improve mood in ways that make falling asleep easier, and supports the body’s natural sleep-wake rhythms. Lauren Jarvis-Gibson july 23, Kansas City Star, 23 July 2026 See All Example Sentences for hormone

Word History

Etymology

Greek hormōn, present participle of horman to stir up, from hormē impulse, assault; akin to Greek ornynai to rouse — more at rise

First Known Use

1905, in the meaning defined at sense 1

Time Traveler
The first known use of hormone was in 1905

Browse Nearby Words

Cite this Entry

“Hormone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hormone. Accessed 1 Aug. 2026.

Kids Definition

: a product of living cells that circulates in body fluids (as blood) or sap and produces a specific and often stimulating effect on cells usually at a distance from the place where it is made

Medical Definition

1
a
: 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
b
: 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

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