I. ˈrā-dē-əl adjective
Etymology: Medieval Latin radialis, from Latin radius ray
Date: 1570
1. : arranged or having parts arranged like rays
2.
a. : relating to, placed like, or moving along a radius
b. : characterized by divergence from a center
3. : of, relating to, or adjacent to a bodily radius
4. : developing uniformly around a central axis
• ra·di·al·ly -ə-lē adverb
II. noun
Date: 1872
1.
a. : a radial part
b. : ray
2. : a body part (as an artery) lying near or following the course of the radius
3. : a pneumatic tire in which the ply cords that extend to the beads are laid at approximately 90 degrees to the centerline of the tread — called also radial-ply tire, radial tire