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a combining form meaning “different,” “other,” used in the formation of compound words:
Also, especially before a vowel, heter-.
Origin of hetero-
combining form of Greek héteros the other of two, other, different Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for heter-


combining form
other, another, or different: heterodyne, heterophony, heterosexual Compare homo-
Word Origin
from Greek heteros other
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 heter-


word-forming element meaning "other, different," from comb. form of Greek heteros "the other (of two), another, different;" first element meaning "one, at one, together," from PIE *sem- "one;" the second cognate with the second element in Latin al-ter, Gothic an-þar, Old English o-ðer "other."

Online Etymology Dictionary, © 2010 Douglas Harper
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heter- in Medicine

hetero- or heter-
Other; different: heterocellular.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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heter- in Science
A prefix that means "different" or "other," as in heterophyllous, having different kinds of leaves.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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