Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun trisomy_21

1 sense of trisomy 21

Sense 1
mongolism, mongolianism, Down's syndrome, Down syndrome, trisomy 21 -- (a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation)
       => trisomy -- (chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell)
       => birth defect, congenital anomaly, congenital defect, congenital disorder, congenital abnormality -- (a defect that is present at birth)