from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The practice of biting one's nails
from The Century Dictionary and Cyclopedia
- n. Same as onychophagy.
Sorry, no etymologies found.
So, I'll have to do this through old-fashioned will power or some 12-step program or through aversion therapy or something. which gives the medical term for nail biting: onychophagia, from the Greek compound comprising the root of onyx (onycho -) "(finger / toe) nail" + phagia "eating."
The site tells us that, "studies seem to suggest a higher incidence of onychophagia amongst people with higher intelligence.