radius
/raydi ss/ • noun (pl. radii /raydi-i/ or radiuses) 1 a straight line from the centre to the circumference of a circle or sphere. 2 a radial line from the focus to any point of a curve. 3 a specified distance from a centre in all directions: pubs within a two-mile radius. 4 Anatomy & Zoology a bone of the forearm or forelimb, in humans the thicker and shorter of two. • verb (radiused, radiusing) often as adj. radiused make (a corner or edge) rounded. — ORIGIN Latin, ‘spoke, ray’.
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