- peronarthrosis
- pero·nar·thro·sis (per″o-nahr-throґsis) [Gr. peronē anything pointed for piercing or pinning + arthrosis] an articulation in which the surfaces are convex in one direction and concave in the other.
Peronarthrosis: metacarpophalangeal joint of the thumb (box).
Medical dictionary. 2011.