Definition of "radial" in English

adjective

1. Arranged like rays that radiate from, or converge to, a common centre.

   • The spokes on most modern bicycle wheels are tangential to the hub rather than radial.

2. (geometry) Of, or relating to a radius (line joining to a geometric centre).

   • What is the relationship between arc length and radial length?

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.

6. (of a vehicle tyre) Having reinforcing cords placed in parallel across the tyre at 90 degrees to the direction of travel, especially as contrasted with cross-ply; see also radial tyre.

noun

1. An item in a radial configuration, such as a spoke of a wheel.

2. A radial tire / radial tyre.