hybridizing hyb·ri·di·zing uncommon noun 1. (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids Synonymshybridizationhybridisationcrossbreedingcrossingcrossinterbreeding Related words Word family hybridizeinterbreedcrosshybridise Broader terms coupling Narrower terms dihybrid crossmonohybrid crossreciprocal crosstestcross WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.