Source : Webster's Revised Unabridged Dictionary (1913)

Popliteal \Pop*lit"e*al\ (?; 277), a. [From L. poples, -itis,
   the ham.] (Anat.)
   Of or pertaining to the ham; in the region of the ham, or
   behind the knee joint; as, the popliteal space.

Source : WordNet®

popliteal
     adj : of or relating to the area behind the knee joint