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hybrid vigor

noun
  1. heterosis.
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Origin of hybrid vigor

First recorded in 1915–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
hybrid vigor in Science

hybrid vigor

  1. The increased vigor or general health, resistance to disease, and other superior qualities that are often manifested in hybrid organisms, especially plants and animals. Compare inbreeding depression.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.