Medical Dictionary

malleolus

noun mal·le·o·lus \ mə-ˈlē-ə-ləs \

medical Definition of malleolus

plural malleoli play \-ˌlī\
:an expanded projection or process at the distal end of the fibula or tibia at the level of the ankle:
a :the expanded lower end 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 end at the ankle called also internal malleolus, medial malleolus
c :a small projection of the tibia on the posterior side of its lower end at the ankle called also posterior malleolus

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