‖ calcaneumPhys.|kælˈkeɪniːəm| [L. (os) calcāneum. f.calc-em heel.] The bone of the heel. 1751Chambers Cycl.1798C. H. Wilkinson Ess.Phys. & Philos. 39 The Calcaneum or hock.1866Huxley Preh. Rem. Caithn. 94 The whole length of the limb from the..head of the femur to the under surface of the calcaneum.