| acrobatic revolutions with the body turned sideways and the arms and legs outstretched like the spokes of a wheel | support consisting of a radial member of a wheel joining the hub to the rim |
| a wheel that has wooden spokes and a metal rim | the length of a line segment between the center and circumference of a circle or sphere |
| a dollar made of silver | the outer and slightly shorter of the two bones of the human forearm |
| | a circular region whose area is indicated by the length of its radius |
| | a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere) |