TRISOMY 21

 I. (noun) 

Sense 1

Meaning:

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

Synonyms:

Down's syndrome; Down syndrome; mongolianism; mongolism; trisomy 21

Classified under:

Nouns denoting stable states of affairs

Hypernyms ("trisomy 21" is a kind of...):

birth defect; congenital abnormality; congenital anomaly; congenital defect; congenital disorder (a defect that is present at birth)

trisomy (chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell)

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