Noun

• S: (n) radius, r (the length of a line segment between the center and circumference of a circle or sphere)
• S: (n) radius (a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere))
• S: (n) radius (a circular region whose area is indicated by the length of its radius) "they located it within a radius of 2 miles"
• S: (n) radius (the outer and slightly shorter of the two bones of the human forearm)
• direct hypernym / inherited hypernym / sister term
• part holonym
• derivationally related form
• S: (n) spoke, wheel spoke, radius (support consisting of a radial member of a wheel joining the hub to the rim)