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Etymology · Latin

radius

7 English words descend from Latin radius, most common first.

rayA beam of light or radiation.
radiusThe long bone in the forearm, on the side of the thumb.
radialArranged like rays that radiate from, or converge to, a common centre.
rayonA manufactured regenerated cellulosic fiber.
radialisA radial muscle, artery, or nerve.
radio-radiation, radioactive
radioleThe spine of a sea urchin.