1. the length of a line segment between the center and circumference of a circle or sphere

Definition categories: attribute, length

2. a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)

Definition categories: shape

3. a circular region whose area is indicated by the length of its radius

- they located it within a radius of 2 miles

Definition categories: location, part, region

4. the outer and slightly shorter of the two bones of the human forearm

Definition categories: body

5. support consisting of a radial member of a wheel joining the hub to the rim

Similar word(s): spoke

Definition categories: man–made, support