[hi-stam-uh-neys, -neyz]
noun Biochemistry, Pharmacology.
an enzyme that catalyzes the decomposition of histamine, used in treating allergies.

1925–30; histamine + -ase

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World English Dictionary
histaminase (hɪˈstæmɪˌneɪs)
Also called: diamine oxidase an enzyme, occurring in the digestive system, that inactivates histamine by removal of its amino group

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American Heritage
Medical Dictionary

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.

The American Heritage® Stedman's Medical Dictionary
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