tarsus
tar.sus \'ta:r-s*s\ \-.si-, -.se-\ n or tar.si [NL, fr. Gk tarsos wickerwork mat, flat of the foot, ankle, edge of the e] pl yelid; akin to Gk tersesthai to become dry - more at THIRST 1: the part of the foot of a vertebrate between the metatarsus and the leg; also : the small bones that support this part of the limb 2: TARSOMETATARSUS 3: the distal part of the limb of an arthropod 4: the tarsal plate of the eyelid