<p><strong>Adjective</strong></p><ul><li>arranged like radii or rays.</li><li>having spokes, bars, lines, etc., arranged like radii, as a machine.</li><li>made in the direction of a radius; going from the center outward or from the circumference inward along a radius: a radial cut.</li><li>pertaining to structures that radiate from a central point, as the arms of a starfish.</li><li>of, like, or pertaining to a radius or a ray.</li><li>having pistons moving inward and outward from a central point or shaft: a radial engine; a radial pump.</li><li>noting a bearing designed primarily to take thrusts radial to the center of rotation.</li><li>of, relating to, or situated near the radius.</li><li>acting along or in the direction of the radius of a circle: radial motion; radial velocity.</li></ul><p><strong>Noun</strong></p><ul><li>a radial section or construction.</li><li>radial tire.</li></ul>