fibula
Anatomical term for the thinner of the two bones in the lower leg.
noun which may take the genitive case particle 'no'
fibular; peroneal
Adjectival use in anatomical contexts, often modifying terms like 神経 (nerve) or 動脈 (artery).
The fibula is the thin bone on the outer side of the tibia.
The peroneal nerve runs along the outer side of the knee.
peroneal artery; fibular artery
fibular hemimelia; fibula agenesis
From 腓 (calf of the leg) + 骨 (bone). The kanji 腓 is a phono-semantic compound with 月 (flesh) and 非 (phonetic, also suggesting 'not' or 'opposite'), referring to the bone opposite the shin.