Down syndrome Hear it!

Down syndrome definition

Down syndrome (do̵un)

a congenital condition characterized by abnormal chromosomes, mental deficiency, a broad face, slanting eyes, a short fifth finger, etc.; Mongolism
also called Down's syndrome

Etymology: after J. L. H. Down (1828-96), Brit physician

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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