Definition of "radial"

radial

/ˈɹeɪdi.əl/

adjective
comparative more radial, superlative most radial
1. Arranged like rays that radiate from, or converge to a common centre.
  Quotations
  A doorknob of whatever roundish shape is effectively a continuum of levers, with the axis of the latching mechanism—known as the spindle—being the fulcrum about which the turning takes place. Applying a force tangential to the knob is essentially equivalent to applying one perpendicular to a radial line defining the lever.
  2012 March, Henry Petroski, “Opening Doors”, in American Scientist‎, volume 100, number 2, pages 112–3
2. Moving along a radius.
3. (anatomy) Of, or relating to the radius bone.
4. (entomology) Of, or relating to the radius (vein), and/or the wing areas next to it.
5. (botany) Developing uniformly on all sides.
noun
plural radials
1. A radial tire / radial tyre.