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See more synonyms for hetero on Thesaurus.com
  1. Chemistry. of or relating to an atom other than carbon, particularly in a cyclic compound.
  2. Informal. heterosexual.
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noun, plural het·er·os.
  1. Informal. a heterosexual person.
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Origin of hetero

1930–35 for def 2; (in def 1) by shortening of heteroatom; (in def 2) by shortening of heterosexual; see -o
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for heteros


noun, adjective plural -os
  1. short for heterosexual
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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