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What does trisomy 21 mean?

April 26, 2017context examples definition dictionary english learning mean sense synonyms trisomy Trisomy 21

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What does trisomy 21 mean?

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• TRISOMY 21 (noun) The noun TRISOMY 21 has 1 sense: 1. a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation Familiarity information: TRISOMY 21 used as a noun is very rare.