say it: RAY-dee-uhl
radial is an adjective and noun meaning "relating to or near the radius". It carries 5 recorded senses.
relating to or near the radius
“the radial aspect of the forearm”
relating to or moving along or having the direction of a radius
“radial velocity”
issuing in rays from a common center; relating to rays of light
“radial heat”
arranged like rays or radii; radiating from a common center
“radial symmetry”
“a starlike or stellate arrangement of petals”
“many cities show a radial pattern of main highways”
pneumatic tire that has radial-ply casing
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for radial come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.