Student Dictionary

One entry found for Down syndrome.
Main Entry: Down syndrome
Pronunciation: primarystressdaudotn-
Variant(s): or Down's syndrome /primarystressdaudotn(z)-/
Function: noun
Etymology: named for J.L.H. Down, 1828-1896, English doctor
: a birth defect marked by moderate to severe mental retardation, by distinctive physical characteristics (as slanted eyes and broad hands with short fingers), and by the presence of three chromosomes numbered 21 in human beings

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