from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Increased vigor or other superior qualities arising from the crossbreeding of genetically different plants or animals.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A property of some hybrids that are more likely to outperform either purebred parent in surviving.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun (genetics) the tendency of a crossbred organism to have qualities superior to those of either parent


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