Term Name:	Down syndrome
Synonyms:	Complete trisomy 21 syndrome, Down's syndrome, Down's syndrome - trisomy 21, Downs syndrome, G Trisomy, trisomy 21 syndrome
Definition:	A chromosomal disease that is characterized by flat-looking facial features and weak muscle tone (hypotonia) in infancy and is caused by trisomy of all or a critical portion of chromosome 21 and is associated with intellectual disability.
Ontology:	Human Disease [DOID:14250]   ( DOID:14250 )