axial UK /ˈæk.sɪ.əl/US /ˈæk.si.əl/adjective 4noun 2forms 3 adjective4 •Relating to, resembling, or situated on an axisThe axial asymmetry of Mercury's inertia ellipsoid may result in a torque that counterbalances the tidal torque — 1965 •Belonging to the axis of the body, or to the axis of any appendage or organthe axial bones •In the same direction as the axis, parallel to the axis.The secondary xylem usually consists of axial and radial elements. •Oriented parallel to the axis running through the centre of a cyclohexane ring, as opposed to equatorial. See Axial bond. noun2 •A flight feather that appears between the primaries and secondaries on some birds. •A plane parallel to the surface of a tooth. formsaxials · more axial · most axial