Read the dictionary definition of radial. All definitions for this word.
1. pneumatic tire that has radial-ply casing
2. arranged like rays or radii; radiating from a common center
1. radial symmetry
2. a starlike or stellate arrangement of petals
3. many cities show a radial pattern of main highways
3. issuing in rays from a common center; relating to rays of light
1. radial heat
4. relating to or moving along or having the direction of a radius
1. radial velocity
5. relating to or near the radius
1. the radial aspect of the forearm