Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun chiefly UK, Canada Condition caused by a
chromosomal deficiency , whereby the patients bear a certainresemblance to theMongoloid race, such as a small head andtilted eyelids.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
Named after John L.H. Langdon-Down (1828-1896), an English physician who described it in the late 1800s. The term was first used in 1961.
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