noun
Obsolete medical term for dementia. Replaced by 認知症 (にんちしょう) in modern usage. Still encountered in older texts or historical contexts.
See also: 認知症
It used to be called '痴呆症', but now '認知症' is the common term.
Compound of 痴呆 (ちほう, 'dementia') and 症 (しょう, 'condition'). The term is now obsolete, replaced by 認知症.