What is the meaning of radial?

noun

• Pneumatic tire that has radial-ply casing.
  • synonyms: radial tire, radial-ply tire

adjective

• Relating to or near the radius.
  • usage: "the radial aspect of the forearm"
• Relating to or moving along or having the direction of a radius.
  • usage: "radial velocity"
• Issuing in rays from a common center; relating to rays of light.
  • usage: "radial heat"
• Arranged like rays or radii; radiating from a common center.
  • usage: "radial symmetry"; "a starlike or stellate arrangement of petals"; "many cities show a radial pattern of main highways"
  • synonyms: stellate, radiate