Webster's English Dictionary

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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