The Collaborative International Dictionary of English v.0.48:

Hypothenal \Hy*poth"e*nal\, Hypothenar \Hy*poth"e*nar\, a.
   [Pref. hypo- + thenar.] (Anat.)
   Of or pertaining to the prominent part of the palm of the
   hand above the base of the little finger, or a corresponding
   part in the forefoot of an animal; as, the hypothenar
   eminence.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hypothenar \Hy*poth"e*nar\, n. (Anat.)
   The hypothenar eminence.
   [1913 Webster]