brux·ism 
(brŭksĭz′əm)
(brŭksĭz′əm)n.
The habitual, involuntary grinding or clenching of the teeth, usually during sleep.
[From New Latin brūxis, a gnashing, from Greek brūkein, to gnash.]
- chronicle
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- chronic obstructive pulmonary disease
- chronic traumatic encephalopathy
- chronic wasting disease
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