Apedia

Bruxism Bruk Si Zehm Noun Habitual Involuntary Grinding Clenching Teeth

Front bruxism \BRUK-si-zehm\
Back noun
The habitual, involuntary grinding or clenching of the teeth, usually during sleep, as from anger, tension, fear, or frustration.

[From New Latin bruxis, a gnashing, from Greek brukein, to gnash.]

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