The Collaborative International Dictionary of English v.0.48:
Radial tire \Radial tire\ (Automobiles) a motor vehicle tire in which the cords run at right angles to the plane of the tire (considered as a disk). [PJC]WordNet (r) 3.0 (2006):
radial tire n 1: pneumatic tire that has radial-ply casing [syn: radial, radial tire, radial-ply tire]