test-cross testcross • test cutter · · · Info · Definitions · Synonyms · Characters · · test-cross · · Text Common · · Latin · · Scripts 10 · · Length 2 · · Syllables Definitions · · · (noun) 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 offspring. Synonyms: testcross. · · Noun Definition 1 Synonyms · · · testcross · · Synonym 1 Characters · · - hyphen-minus U+002D c latin small letter c U+0063 e latin small letter e U+0065 o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074