noun (plural -mies) Etymology: tri- + 3-some + 2-y Date: 1930 the condition (as in Down syndrome) of having one or a few chromosomes triploid in an otherwise diploid set, trisomic adjective or noun
TRISOMY
Meaning of TRISOMY in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012