noun
A formal or technical term for a wisdom tooth. In everyday conversation, 親知らず (oyashirazu) is far more common.
See also: 親知らず
知恵歯が生えてきて痛い。
My wisdom tooth is coming in and it hurts.
歯科医に知恵歯の抜歯を勧められた。
The dentist recommended extraction of my wisdom tooth.