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heterosis

[het-uh-roh-sis] /ˌhɛt əˈroʊ sɪs/
noun, Genetics.
1.
the increase in growth, size, fecundity, function, yield, or other characters in hybrids over those of the parents.
Also called hybrid vigor.
Origin
1910-1915
1910-15; < Late Greek hetérōsis an alteration. See hetero-, -sis
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for heterosis
  • Maize was the first species where heterosis was widely used to produce hybrids.
British Dictionary definitions for heterosis

heterosis

/ˌhɛtəˈrəʊsɪs/
noun
1.
(biology) another name for hybrid vigour
Word Origin
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
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