or  Rett syndrome  n :  a familial disorder that affects females usu. during infancy, that results from arrested brain development, and that is characterized by cognitive and psychomotor deterioration, dementia, stunted head growth, stereotyped hand movements, and mild hyperammonemia
 
Rett, Andreas (fl 1966-1968), Austrian physician. Rett published his first description of Rett's syndrome in 1966, supplementing it with another report in 1968.
 
 
 
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