Source : Webster's Revised Unabridged Dictionary (1913)

Metatarsal \Met`a*tar"sal\, a. (Anat.)
   Of or pertaining to the metatarsus. -- n. A metatarsal bone.

Source : WordNet®

metatarsal
     adj : of or relating to the metatarsus; "metatarsal bones"

metatarsal
     n : any bone of the foot between the ankle and the toes