Search Result：trisomy 21
trisomy 21 
(TTS Sound)
(TTS Sound)Overview of noun trisomy_21
The noun trisomy 21 has 1 sense
- 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)