[hi-stam-uh-neys, -neyz] /hɪˈstæm əˌneɪs, -ˌneɪz/

noun, Biochemistry, Pharmacology.
an enzyme that catalyzes the decomposition of , used in treating allergies.
an enzyme, occurring in the digestive system, that inactivates histamine by removal of its amino group Also called diamine oxidase

histaminase his·tam·i·nase (hĭ-stām’ə-nās’, -nāz’, hĭs’tə-mə-)
An enzyme that inactivates histamine and is found in the digestive system.


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  • Histamine

    [his-tuh-meen, -min] /ˈhɪs təˌmin, -mɪn/ noun 1. Biochemistry, Physiology. a heterocyclic amine, C 5 H 9 N 3 , released by mast cells when tissue is injured or in allergic and inflammatory reactions, causing dilation of small blood vessels and smooth muscle contraction. 2. Pharmacology. a commercial form of this compound, obtained from and used […]

  • Histamine-blocker

    noun, Pharmacology. 1. any of various substances that act at a specific receptor site to block certain actions of histamine.

  • Histamine-fast

    histamine-fast his·ta·mine-fast (hĭs’tə-mēn-fāst’, -mĭn-) adj. Of or relating to the absence of the normal response to histamine, especially regarding gastric anacidity.

  • Histamine-headache

    noun 1. .

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