malleolus

mal·le·o·lus

noun \mə-ˈlē-ə-ləs\

plural mal·le·o·li \-ˌlī\

Definition of MALLEOLUS

: an expanded projection or process at the distal extremity of each bone of the leg: a : the expanded lower extremity of the fibula situated on the lateral side of the leg at the ankle—called also external malleolus, lateral malleolus b : a strong pyramid-shaped process of the tibia that projects distally on the medial side of its lower extremity at the ankle—called also internal malleolus, medial malleolus