1. (noun)radial, radial tire, radial-ply tire pneumatic tire that has radial-ply casing
2. (adj)radial relating to or near the radius "the radial aspect of the forearm"
3. (adj)radial relating to or moving along or having the direction of a radius "radial velocity"
4. (adj)radial issuing in rays from a common center; relating to rays of light "radial heat"
5. (adj)radial, stellate, radiate arranged like rays or radii; radiating from a commoncenter "radial symmetry"; "a starlike or stellate arrangement of petals"; "many cities show a radial pattern of main highways"