Dictionary![]() ![]() Down' syn'dromePathol. a genetic disorder, associated with the presence of an extra chromosome 21, characterized by mild to severe mental retardation, weak muscle tone, a low nasal bridge, and epicanthic folds at the eyelids. Also,Down's syndrome.Formerly, mongolism. Also called trisomy 21. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
|
|