eponychium

Noun

eponychium (plural eponychia)

1. The thickened layer of skin adjoining fingernails and toenails, particularly at the base of the nail.
   • The nail is replaced to provide a physiologic dressing and to splint open the eponychium so that a new nail will grow in place.2008, Peter M. Antevy, Richard A. Saladino, “103: Management of Finger Injuries”, in Christopher King, Fred M. Henretig, editors, Textbook of Pediatric Emergency Procedures, page 947
   • The cuticle (KYOO-tih-kul) is the crescent of dead, colorless tissue attached to the nail plate around the base of the nail. It forms a seal between the eponychium and the nail plate to prevent the entry of foreign materials and microorganisms and to help prevent injury and infection.2011, Maura Scali-Scheahan, Milady Standard Professional Barbering, 5th edition, Cengage Learning, page 673

   Synonyms:

   medial nail fold, proximal nail fold

2. The protective capsule that surrounds the hoof of foetuses and neonates of hoofed animals, which disappears soon after birth, but remnants of which remain as part of the permanent hoof.
   • The hooves are tipped with collagenous eponychia, which prevents damage to the amnion and beyond.2012, Paul McGreevy, Equine Behavior: A Guide for Veterinarians and Equine Scientists, 2nd edition, page 163
   • The presence of eponychium (also called “foal slippers”) on the feet (Figure 172-3) is indicative that the foal has not yet stood.2014, Kevin T. Corley, Jonna M. Jokisolo, Chapter 172: Evaluation of the Compromised Neonatal Foal, Kim A. Sprayberry, N. Edward Robinson, Robinson's Current Therapy in Equine Medicine, 7th Edition...