tibiotalar
adjective medical specialized uk/ˌtɪb.i.əʊˈteɪ.lər/ us/ˌtɪb.i.oʊˈteɪ.lɚ/
胫骨踞骨的
relating to the tibia (= the large bone at the front of the lower leg) and the talus (= one of the bones of the foot), especially ankle joint between them