/ Dictionary / Index R radial tire: Meaning and Definition of Find definitions for: ra'dial tire' Pronunciation: [key] a motor-vehicle tire in which the plies or cords run from one bead to the other at right angles to both beads. See illustration under.Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radial symmetry radial triangulation Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language