Search Result for "williams syndrome":
Wordnet 3.0

NOUN (1)

1. a rare congenital disorder associated with deletion of genetic material in chromosome 7; characterized by mental deficiency and some growth deficiency and elfin faces but an overly social personality and a remarkable gift for vocabulary; 



WordNet (r) 3.0 (2006):

Williams syndrome
    n 1: a rare congenital disorder associated with deletion of
         genetic material in chromosome 7; characterized by mental
         deficiency and some growth deficiency and elfin faces but
         an overly social personality and a remarkable gift for
         vocabulary