radius - definition, thesaurus and related words from WordNet-Online

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Noun radius has 5 senses

radius, r - the length of a line segment between the center and circumference of a circle or sphere
--₁ is a kind of length
--₁ is a part of diameter, diam
--₁ has particulars: semidiameter; radius of curvature
radius - a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
--₂ is a kind of straight line
radius - a circular region whose area is indicated by the length of its radius; "they located it within a radius of 2 miles"
--₃ is a kind of region, part
radius - the outer and slightly shorter of the two bones of the human forearm
--₄ is a kind of arm bone
--₄ is a part of forearm
spoke, radius - support consisting of a radial member of a wheel joining the hub to the rim
--₅ is a kind of support
--₅ is a part of bicycle wheel; cartwheel; wagon wheel