It's also the sunny source of radial, which joined our language in the 1500s as an adjective meaning "arranged or having parts arranged like rays." Radial has bourgeoned in meaning over the centuries, adopting unique applications across many fields including medicine, engineering, and astronomy.
going from the center outward or from the circumference inward along a radius: a radial cut. Zoology pertaining to structures that radiate from a central point, as the arms of a starfish.
Radial refers to the pattern that you get when straight lines are drawn from the centre of a circle to a number of points round the edge. The white marble floors were inlaid in a radial pattern of brass.
The adjective radial describes anything that acts as a radius or resembles one — often something radial is literally a line sticking straight out from a center point.
