radial
adjective(ra-di-al)
arranged like rays or radii; radiating from a common center
Examples:
Radial symmetry. 
Many cities show a radial pattern of main highways. 
radial
noun(ra-di-al)
pneumatic tire that has radial-ply casing
Synonyms: radial-ply tire, radial tire, 
radial
(ra-di-al)
relating to or near the radius
Examples:
The radial aspect of the forearm. 
radial
(ra-di-al)
relating to or moving along or having the direction of a radius
Examples:
Radial velocity. 
radial
(ra-di-al)
issuing in rays from a common center; relating to rays of light
Examples:
Radial heat.