Radial (adjective)

1. Relating to or arranged like rays or radii.
2. Relating to or denoting a tire in which the cords are arranged at right angles to the tread and the wheel.
3. Relating to or denoting a type of engine in which the cylinders are arranged in a radial configuration.

Origin:

Early 17th century (in the sense "pertaining to rays"): from latin radialis, from radius "ray".

Examples:

1. The sunflower has radial symmetry.
2. He was driving on radial tires.
3. The aircraft was powered by radial engine.
4. The radial nerve supplies the muscles of the forearm.
5. The radial artery is located on the thumb side of the wrist.