metacarpus

from WordNet (r) 3.0 (2006)

metacarpus
    n 1: the part of the hand between the carpus and phalanges

from The Collaborative International Dictionary of English v.0.48

Metacarpus \Met`a*car"pus\, n. [NL., fr. Gr. ?; ? beyond,
   between + ? the wrist.] (Anat.)
   That part of the skeleton of the hand or forefoot between the
   carpus and phalanges. In man it consists of five bones. See
   Illust. of {Artiodactyla}.
   [1913 Webster] Metacenter