autism -
(psychiatry) an abnormal absorption with the self; marked by communication disorders and short attention span and inability to treat others as people
syndrome a complex of concurrent things; "every word has a syndrome of meanings"
Autism is a disorder of neural development characterized by impaired social interaction and communication, and by restricted and repetitive behavior. These signs all begin before a child is three years old. Autism affects information processing in the brain by altering how nerve cells and their synapses connect and organize; how this occurs is not well understood.
OmegaWiki Dictionary
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autism Abnormal self-absorption, first observed in childhood, characterised by lack of response to people and limited ability to communicate.