axial

Etymology

axis + -al

adj

1. Relating to, resembling, or situated on an axis
   The axial asymmetry of Mercury's inertia ellipsoid may result in a torque that counterbalances the tidal torque November 6, 1965, G. Colombo, “Rotational Period of the Planet Mercury”, in Nature, volume 208, number 575, →DOI
2. (anatomy) Belonging to the axis of the body, or to the axis of any appendage or organ
   the axial skeleton
   the axial bones
3. (botany) In the same direction as the axis, parallel to the axis.
   The secondary xylem usually consists of axial and radial elements.
4. (chemistry) oriented close to the axis running through the centre of a cyclohexane ring, as opposed to equatorial. See w:Axial bond.

noun

1. (ornithology) A flight feather that appears between the primaries and secondaries on some birds.
2. (dentistry) A plane parallel to the surface of a tooth.