Source : Webster's Revised Unabridged Dictionary (1913)

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.

Source : WordNet®

humerus
     n : bone extending from the shoulder to the elbow
     [also: {humeri} (pl)]