Trisomy 21 — synonyms, definition

1. trisomy 21 (Noun)

Down syndrome Down's syndrome mongolianism mongolism

trisomy 21 (Noun) — A congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation.

birth defect congenital abnormality congenital anomaly congenital defect congenital disorder trisomy