arranged like radii or rays.

having spokes, bars, lines, etc., arranged like radii, as a machine.

made in the direction of a radius; going from the center outward or from the circumference inward along a radius

a radial cut.

Zoology . pertaining to structures that radiate from a central point, as the arms of a starfish.

of, like, or pertaining to a radius or a ray.

Machinery .

having pistons moving inward and outward from a central point or shaft

a radial engine; a radial pump.

noting a bearing designed primarily to take thrusts radial to the center of rotation.

Anatomy, Entomology . of, pertaining to, or situated near the radius.

acting along or in the direction of the radius of a circle

radial motion; radial velocity.

a radial section or construction.

Automotive . radial tire.