c. 1400, "of or like a ray or radius," from Medieval Latin radialis, from Latin radius "shaft, rod; spoke of a wheel; beam of light" (see radius). As a noun, a type of tire, attested from 1965, short for radial-ply (tire). Related: Radially.
the radial aspect of the forearm
radial velocity
radial heat
radial symmetry
many cities show a radial pattern of main highways
racquet
racquetball
racy
rad
radar
radial
radian
radiance
radiant
radiate
radiation
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