RADIAL

I. adjective Etymology: Medieval Latin ~is, from Latin radius ray Date: 1570 arranged or having parts arranged like rays, 2. relating to, placed like, or moving along a radius, characterized by divergence from a center, of, relating to, or adjacent to a bodily radius, developing uniformly around a central axis, ~ly adverb II. noun Date: 1872 1. a ~ part, ray , a body part (as an artery) lying near or following the course of the radius, 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