[ his-ti-deen, -din ]
/ ˈhɪs tɪˌdin, -dɪn /
an essential amino acid, C3H3N2CH2CH(NH2)COOH, that is a constituent of proteins and is important as the iron-binding site in hemoglobin. Abbreviation: His; Symbol: H
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Also his·ti·din [his-ti-din]. /ˈhɪs tɪ dɪn/.
Words nearby histidine
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for histidine
/ (ˈhɪstɪˌdiːn, -dɪn) /
a nonessential amino acid that occurs in most proteins: a precursor of histamine
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
Medical definitions for histidine
[ hĭs′tĭ-dēn′, -dĭn ]
An amino acid that is essential for tissue growth and repair.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for histidine
[ hĭs′tĭ-dēn′ ]
An amino acid that is essential for children but not for adults. Chemical formula: C6H9N3O2.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.