Down syndrome
(doun) or Down's syndrome (dounz)n.
A congenital disorder caused by the presence of an extra 21st chromosome and marked usually by moderate to severe intellectual disabilities, short stature, and a flattened facial profile. Also called trisomy 21.
[After John Langdon Haydon Down (1828-1896), British physician.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Down′
(or Down's′) syn′drome
n.
a genetic disorder associated with the presence of an extra chromosome 21, characterized by mental retardation, weak muscle tone, and epicanthic folds at the eyelids.
Formerly, mongolism. Also called trisomy 21. [1960–65; after John Latin. H. Down (1828–96), British physician]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Down syndrome
A congenital disorder caused by the presence of an extra 21st chromosome. People with Down syndrome have mild to moderate mental retardation, short stature, and a flattened facial profile.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
| Noun | 1. |  Down syndrome - a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardationbirth defect, congenital abnormality, congenital anomaly, congenital defect, congenital disorder - a defect that is present at birth trisomy - chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell |
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Translations
síndrome de Down
Downin oireyhtymäDownin syndroomamongolismimongoloidismi
syndrome de Down
sindrom Down
ダウン症
downsyndroommongolismesyndroom van Down
Downs syndrom
Down syn·drome
[MIM*190685]n. síndrome de Down, anormalidad citogenética del cromosoma 21 caracterizada por retraso mental y facciones mongoloides.
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