topcross
noun
top·cross
ˈtäp-ˌkrȯs 
: a cross between a superior or purebred male and inferior female stock to improve the average quality of the progeny
also
: the product of such a cross
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“Topcross.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/topcross. Accessed 21 Dec. 2024.
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