/ Thesaurus / T Synonyms of test cross Find synonyms for: Noun1. testcross, test-cross, hybridization, hybridisation, crossbreeding, crossing, cross, interbreeding, hybridizingusage: a cross between an organism whose genotype for a certain trait is unknown and an organism that is homozygous recessive for that trait so the unknown genotype can be determined from that of the offspringWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language