Meaning of onychophagia

on•y•cho•pha•gia

Pronunciation: (on"i-kō-fā'ju, -jē-u), [key]
— n. Psychiatry.
  1. the practice of biting one's nails, esp. when done habitually and as a symptom of emotional disturbance.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.