radial radial /ˈreɪdiːəl/

adjective

1. () Relating to or moving along or having the direction of a radius  ( radial )
   relating to or moving along or having the direction of a radius
    Radial velocity
   radial velocity
   
2. () Relating to or near the radius  ( radial )
   relating to or near the radius
    The radial aspect of the forearm
   the radial aspect of the forearm
   
3. Arranged like rays or radii; radiating from a common center  ( radial , radiate , stellate )
   arranged like rays or radii; radiating from a common center
    Radial symmetry
   radial symmetry
    A starlike or stellate arrangement of petals
   a starlike or stellate arrangement of petals
    Many cities show a radial pattern of main highways
   many cities show a radial pattern of main highways
   
4. Issuing in rays from a common center; relating to rays of light  ( radial )
   issuing in rays from a common center; relating to rays of light
    Radial heat
   radial heat
   

noun

1. Pneumatic tire that has radial-ply casing  ( radial , radial tire [ N. American] , radial-ply tire [ N. American] , radial-ply tyre [British] , radial tyre [British] )
   pneumatic tire that has radial-ply casing