Origin of heterosis

First recorded in 1910–15, heterosis is from the Late Greek word hetérōsis an alteration. See hetero-, -sis
Also called hybrid vigor.
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British Dictionary definitions for heterosis


  1. biology another name for hybrid vigour

Word Origin for heterosis

C19: from Late Greek: alteration, from Greek heteroioun to alter, from heteros other, different
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