The Collaborative International Dictionary of English v.0.48:

Carpus \Car"pus\ (k[aum]r"p[u^]s), n.; pl. Carpi
   (k[aum]r"p[imac]). [NL., fr. Gr. karpo`s wrist.] (Anat.)
   The wrist; the bones or cartilages between the forearm, or
   antibrachium, and the hand or forefoot; in man, consisting of
   eight short bones disposed in two rows.
   [1913 Webster]

WordNet (r) 3.0 (2006):

carpus
    n 1: a joint between the distal end of the radius and the
         proximal row of carpal bones [syn: wrist, carpus,
         wrist joint, radiocarpal joint, articulatio
         radiocarpea]

Hitchcock's Bible Names Dictionary (late 1800's):

Carpus, fruit; fruitful