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[moi-i-tee] /ˈmɔɪ ɪ ti/
noun, plural moieties.
a half.
an indefinite portion, part, or share.
Anthropology. one of two units into which a tribe or community is divided on the basis of unilineal descent.
Origin of moiety
late Middle English
1400-50; late Middle English moite < Middle French < Latin medietāt- (stem of medietās) the middle, equivalent to medi(us) mid + -etāt-, variant, after vowels, of -itāt- -ity Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for moiety


noun (archaic) (pl) -ties
a half
one of two parts or divisions of something
Word Origin
C15: from Old French moitié, from Latin mediētās middle, from medius
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
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Word Origin and History for moiety

"an equal half," mid-15c., from Old French moite, earlier meitiet (12c., Modern French moitié) "half; middle; portion, piece," from Latin meditatem (nominative medietas) "half," originally "middle point," from medius "middle" (see medial (adj.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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moiety in Medicine

moiety moi·e·ty (moi'ĭ-tē)
One of two or more parts into which something may be divided, such as the various parts of a vitamin or molecule.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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