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demesne
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dementia

de·men·tia [ di ménshə ]


noun 
Definition:
 
cognitive and intellectual deterioration: the usually progressive deterioration of intellectual functions such as memory that can occur while other brain functions such as those controlling movement and the senses are retained.
See also  senile dementia


[Late 18th century. < Latin< dement-< de- "away" + ment- "mind"]
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