Down syndrome

Definition of Down syndrome

Down´ syn`drome
n.1.(Med.) A congenital disorder caused by an extra chromosome 21 in some or all cells. It causes a variable number and degree of abnormalities, including retarded growth, mental retardation, a short nose, prominent epicanthic folds on the eyelids, a protruding lower lip, and other physical features having varying degrees of deviation from the normal. Called also mongolism, trisomy-21 and trisomy 21 syndrome.

Related Words

backwardness, birth defect, congenital abnormality, congenital anomaly, congenital defect, congenital disorder, Down's syndrome, mental retardation, mongolianism, mongolism, retardation, slowness, subnormality, trisomy, trisomy 21
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