hetero

[het-uh-roh] Origin

het·er·o

[het-uh-roh] adjective, noun, plural het·er·os.
adjective
1.
Chemistry. of or pertaining to an atom other than carbon, particularly in a cyclic compound.
2.
Informal. heterosexual.
noun
3.
Informal. a heterosexual person.

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Hetero is always a great word to know.
So is addition. Does it mean:
a reaction in which two or more substances combine to form another compound
a double sulfate analogous to potassium alum, as aluminum ammonium sulfate, with the formula R2SO4?X2(SO4)3?24H2O, where R is alkali metal or ammonium

Origin:
1930–35 for def. 2; (in def. 1) by shortening of heteroatom; (in def. 2) by shortening of heterosexual; see -o
Dictionary.com Unabridged

hetero-

a combining form meaning “different,” “other,” used in the formation of compound words: heterocyclic.
Also, especially before a vowel, heter-.


Origin:
combining form of Greek héteros the other of two, other, different
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins
World English Dictionary
hetero (ˈhɛtərəʊ)
 
n, —adj , pl -os
short for heterosexual

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

hetero-
"other, different," from comb. form of Gk. heteros "the other (of two), another, different;" first element meaning "one, at one, together;" the second cognate with the second element in L. al-ter, Goth. an-þar, O.E. o-ðer "other."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

hetero- or heter-
pref.
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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American Heritage
Science Dictionary
hetero-  
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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