astragalar,a.Phys.|əˈstrægələ(r)| [f. astragal-us + -ar.] Of or pertaining to an astragalus. 1854Owen in Circ.Sc.Org.Nat. I. 218 The astragalar part..would seem to include the scaphoid.1866Huxley Preh. Rem. Caithn. 146 The astragalar articular surfaces.