trisomy 21

1. 1.

   a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation

   SynonymsmongolismmongolianismDown's syndromeDown syndrome

   Broadertrisomybirth defect

Questions about trisomy 21

What does trisomy 21 mean?

trisomy 21 means "a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation".

What is another word for trisomy 21?

Close synonyms include mongolism, mongolianism, Down's syndrome, Down syndrome. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is trisomy 21 a common word?

trisomy 21 is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.