fibula

fib·u·la

noun \ˈfib-yə-lə\

plural fib·u·lae \-lē also -ˌlī\ or fib·u·las

Definition of FIBULA

: the outer or postaxial and usually the smaller of the two bones of the hind or lower limb below the knee that is the slenderest bone of the human body in proportion to its length, articulates above with the external tuberosity of the tibia and below with the talus, and has its lower end forming the external malleolus of the ankle—called also calf bone

—fib·u·lar \-lər\ adjective

Illustration of FIBULA