histamine
noun
his·ta·mine
ˈhi-stə-ˌmēn 
-mən
-mən
: a compound C5H9N3 especially of mammalian tissues that causes dilation of capillaries, contraction of smooth muscle, and stimulation of gastric acid secretion, that is released during allergic reactions, and that is formed by decarboxylation of histidine
Examples of histamine in a Sentence
Recent Examples on the Web
Dry, itchy skin can sometimes be associated with overactive histamines, and suggests taking a daily antihistamine until the condition has resolved.
—
Kelsey Eisen, Allure, 28 Oct. 2024
When your immune system detects an allergen, mast cells release histamine and other chemicals that cause your blood vessels to become a bit leaky.
—Katie Camero, SELF, 23 Oct. 2024
These medications also affect other neurotransmitters, including histamine and histamine receptors.10 This effect leads to various side effects, including fatigue and sedation.
—Lana Barhum, Verywell Health, 8 Oct. 2024
Most of these reactions are pseudo allergies, which occur because opioids cause the body to release histamine, leading to symptoms like itching, hives, and sweating.
—Sarah Jividen, Verywell Health, 12 Sep. 2024
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Kelsey Eisen, Allure, 28 Oct. 2024
When your immune system detects an allergen, mast cells release histamine and other chemicals that cause your blood vessels to become a bit leaky.
—Katie Camero, SELF, 23 Oct. 2024
These medications also affect other neurotransmitters, including histamine and histamine receptors.10 This effect leads to various side effects, including fatigue and sedation.
—Lana Barhum, Verywell Health, 8 Oct. 2024
Most of these reactions are pseudo allergies, which occur because opioids cause the body to release histamine, leading to symptoms like itching, hives, and sweating.
—Sarah Jividen, Verywell Health, 12 Sep. 2024
See all Example Sentences for histamine
Dictionary Entries Near histamine
Cite this Entry
“Histamine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/histamine. Accessed 22 Nov. 2024.
Copy CitationKids Definition
histamine
noun
his·ta·mine
ˈhis-tə-ˌmēn
-mən
: a compound that occurs in many animal tissues and plays an important part in allergic reactions (as in hives, asthma, and hay fever)
Medical Definition
histamine
noun
his·ta·mine
ˈhis-tə-ˌmēn
-mən
-mən
: a compound C5H9N3 especially of mammalian tissues that causes dilatation of capillaries, contraction of smooth muscle, and stimulation of gastric acid secretion, that is released during allergic reactions, and that is formed by decarboxylation of histidine
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