astragalocalcaneum noun1 •A fused astragalus and calcaneumIn Camposaurus arizonensis from the Norian of Arizona, USA, widely regarded as the oldest neotheropod[58 ,25 ], the distal fibula is fused to the distal tibia and to the fused astragalocalcaneum. — 2016 formsastragalocalcanea · astragalocalcaneums
