Source : Webster's Revised Unabridged Dictionary (1913)

Heteropelmous \Het`er*o*pel"mous\, a. [Hetero- + Gr. ? the sole
   of the foot.] (Anat.)
   Having each of the two flexor tendons of the toes bifid, the
   branches of one going to the first and second toes; those of
   the other, to the third and fourth toes. See Illust. in
   Append.