radii

'radii'

[radius.n.01] as in: the length of a line segment between the center and circumference of a circle or sphere

'radii'

[radius.n.02] as in: a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)

'radii'

[radius.n.03] as in: a circular region whose area is indicated by the length of its radius

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Examples:
they located it within a radius of 2 miles

'radii'

[radius.n.04] as in: the outer and slightly shorter of the two bones of the human forearm

'radii'

[spoke.n.01] as in: support consisting of a radial member of a wheel joining the hub to the rim