histamine
Biochemistry, Physiology. a heterocyclic amine, C5H9N3, released by mast cells when tissue is injured or in allergic and inflammatory reactions, causing dilation of small blood vessels and smooth muscle contraction.
Pharmacology. a commercial form of this compound, obtained from histidine and used chiefly in the diagnosis of gastric and circulatory functions.
Origin of histamine
1- Also his·ta·min [his-tuh-min]. /ˈhɪs tə mɪn/.
Other words from histamine
- his·ta·min·ic [his-tuh-min-ik], /ˌhɪs təˈmɪn ɪk/, adjective
- Compare antihistamine.
Words Nearby histamine
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use histamine in a sentence
Depending on the cause of a peptic ulcer, your doctor may prescribe different medications—such as proton pump inhibitors, histamine receptor blockers, or protectants—to relieve pain.
People with histamine allergies may even experience headaches, though probably not as severe as the migraines that can be triggered by cogeners, says Bonci.
Red wine is a trifecta of chemicals that can make some people feel terrible | empire | June 24, 2021 | Popular-Science
British Dictionary definitions for histamine
/ (ˈhɪstəˌmiːn, -mɪn) /
an amine formed from histidine and released by the body tissues in allergic reactions, causing irritation. It also stimulates gastric secretions, dilates blood vessels, and contracts smooth muscle. Formula: C 5 H 9 N 3: See also antihistamine
Origin of histamine
1Derived forms of histamine
- histaminic (ˌhɪstəˈmɪnɪk), adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for histamine
[ hĭs′tə-mēn′ ]
An organic compound found widely in animals and plants that in humans and other mammals is released as part of the body's immune response, causing physiological changes including dilation of the blood vessels, contraction of smooth muscle (as in the airways), and increased gastric acid secretion. The itching and sneezing typical of respiratory allergies are caused by the release of histamine. Chemical formula: C5H9N3
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Browse