The Collaborative International Dictionary of English v.0.48:
Peroneal \Per`o*ne"al\, a. [Gr. ? the fibula.] (Anat.) Of or pertaining to the fibula; in the region of the fibula. [1913 Webster]WordNet (r) 3.0 (2006):
peroneal adj 1: of or relating to the fibula or the outer part of the leg below the knee