de·men·tia /dɪˈmɛn(t)ʃə, ʃiə/
痴呆
de·men·tia /dɪˈmɛnʧə/ 名詞
痴呆
De·men·ti·a n. Insanity; madness; esp. that form which consists in weakness or total loss of thought and reason; mental imbecility; idiocy.
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dementia
n : mental deterioration of organic or functional origin [syn: dementedness]