[hi-stam-uh-neys, -neyz]

noun Biochemistry, Pharmacology.

an enzyme that catalyzes the decomposition of histamine, used in treating allergies.

Origin of histaminase

First recorded in 1925–30; histamine + -ase
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British Dictionary definitions for histaminase



an enzyme, occurring in the digestive system, that inactivates histamine by removal of its amino groupAlso called: diamine oxidase
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

histaminase in Medicine


[hĭ-stămə-nās′, -nāz′, hĭstə-mə-]


An enzyme that inactivates histamine and is found in the digestive system.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.