1. [syn: heterosis, hybrid vigor]
The Collaborative International Dictionary of English v.0.48:
Heterosis \Het`e*ro"sis\, n. [NL., fr. Gr. ? alteration, fr. ?
other, different.] (Rhet.)
A figure of speech by which one form of a noun, verb, or
pronoun, and the like, is used for another, as in the
sentence: "What is life to such as me?" --Aytoun.
WordNet (r) 3.0 (2006):
n 1: (genetics) the tendency of a crossbred organism to have
qualities superior to those of either parent [syn:
heterosis, hybrid vigor]