What is the term for bitten nails?

The term for bitten nails is "onychophagy," which refers specifically to the habit of biting one's nails. This condition often arises due to anxiety or stress and can lead to both cosmetic and health issues, such as infections or damage to the nail bed and surrounding skin. Understanding this term is crucial for manicurists and other professionals in the beauty and health industry, as they may encounter clients with this common habit.

The other terms listed relate to different nail conditions: "onychorrhexis" refers to brittle nails with longitudinal ridges, "onycholysis" is the separation of the nail from the nail bed, and "onychopaghy" is not a commonly recognized term in the field. Thus, onychophagy is the accurate term related to the practice of nail-biting.