polysomy polysomous • polyspast · · · Info · Definitions · Characters · · polysomy · · Text Latin · · Script 8 · · Length 4 · · Syllables Definitions · · · (noun) congenital defect of having one or more extra chromosomes in somatic cells. · · Noun Definition 1 Characters · · l latin small letter l U+006C m latin small letter m U+006D o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073 y latin small letter y U+0079