onychophagia

American

[on-i-koh-fay-juh, -jee-uh] / ˌɒn ɪ koʊˈfeɪ dʒə, -dʒi ə /

noun

Psychiatry.

the practice of biting one's nails, especially when done habitually and as a symptom of emotional disturbance.

1895–1900; < Greek onycho- (combining form of ónyx nail, claw; see onyx) + -phagia

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023