The Collaborative International Dictionary of English v.0.48:

Humerus \Hu"me*rus\, n.; pl. Humeri. [L.] (Anat.)
   (a) The bone of the brachium, or upper part of the arm or
       fore limb.
   (b) The part of the limb containing the humerus; the
       brachium.
       [1913 Webster]