Astrag'alus, a bone of the foot, which, by a convex upper surface and smooth sides, forms, with the leg-bones, the hinge of the ankle-joint. Its lower surface is concave, and rests on the os calcis, or heel-bone. See FOOT.
Astrag'alus
Chambers's Encyclopaedia, Volume 1: A to Beaufort, p. 523
Source scan(s): p. 0544