proximal (prox)

proximal (prox) /prok″siməl/ [L, proximus] , nearer to a point of reference or attachment, usually the trunk of the body, than other parts of the body. Proximal interphalangeal joints are those closest to the hand or the surface of a tooth in relation to the abutting tooth nearer or farther from the anteroposterior median plane. Compare distal.

Proximal surface of the tooth (Bath-Balogh and Fehrenbach, 2011)