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
In certain cases, healthcare providers may prescribe estrogen therapy, available in forms such as pills, creams, or rings, each delivering the hormone differently.
—
Sandra Rose Salathe, Flow Space, 21 Mar. 2025
An enzyme called 5-alpha reductase changes the hormone into dihydrotestosterone.
—Rj MacKenzie, Popular Science, 20 Mar. 2025
In addition to the physical symptoms, dehydration triggers the release of stress hormones, impacts neurotransmitters, and disrupts cognition (thinking ability), all of which can contribute to feelings of anxiety or panic.12
6.
—Mark Gurarie, Verywell Health, 19 Mar. 2025
Doing so just sends a message to the brain that turns off melatonin, the hormone that triggers sleepiness, Krieger said.
—Sandee Lamotte, CNN, 19 Mar. 2025
See All Example Sentences for hormone
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Sandra Rose Salathe, Flow Space, 21 Mar. 2025
An enzyme called 5-alpha reductase changes the hormone into dihydrotestosterone.
—Rj MacKenzie, Popular Science, 20 Mar. 2025
In addition to the physical symptoms, dehydration triggers the release of stress hormones, impacts neurotransmitters, and disrupts cognition (thinking ability), all of which can contribute to feelings of anxiety or panic.12
6.
—Mark Gurarie, Verywell Health, 19 Mar. 2025
Doing so just sends a message to the brain that turns off melatonin, the hormone that triggers sleepiness, Krieger said.
—Sandee Lamotte, CNN, 19 Mar. 2025
See All Example Sentences for hormone
Cite this Entry
“Hormone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hormone. Accessed 1 Apr. 2025.
Copy CitationKids Definition
hormone
noun
hor·mone
ˈhȯr-ˌmōn 
: 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
hormone
noun
hor·mone
ˈhȯr-ˌmōn
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
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
Beth Witrogen McLeod, Cooking LightLove words? Need even more definitions?
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