Radius vs. Radii

Difference Between Radius and Radii
Radiusnoun
(anatomy) The long bone in the forearm, on the side of the thumb.
Radiusnoun
(zoology) The lighter bone (or fused portion of bone) in the forelimb of an animal.
Radiusnoun
(entomology) One of the major veins of the insect wing, between the subcosta and the media
Radiusnoun
(geometry) A line segment between any point of a circle or sphere and its center.
Radiusnoun
(geometry) The length of this line segment.
Radiusnoun
Anything resembling a radius, such as the spoke of a wheel, the movable arm of a sextant, or one of the radiating lines of a spider's web.
Radiusnoun
the length of a line segment between the center and circumference of a circle or sphere
Radiusnoun
a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
Radiusnoun
a circular region whose area is indicated by the length of its radius;
they located it within a radius of 2 milesRadiusnoun
the outer and slightly shorter of the two bones of the human forearm
Radiusnoun
support consisting of a radial member of a wheel joining the hub to the rim