Definition of onychophagia in English:

onychophagia

Pronunciation /ˌɒnɪkə(ʊ)ˈfeɪdʒ(ɪ)ə/

noun

  • The action or habit of biting one's nails.

Origin

Late 19th century. From onycho- + -phagia. Compare earlier onychophagist, and slightly earlier onychophagy.