pl. of Radius., of Radius
radii
Radii is the plural of the word 'radius'. It comes from the Latin word of the same spelling meaning beam, staff or rod. Most European languages derived from Latin.
2 radii = one diameter
There are infinite radii in a sphere.
Radii is a brand of sports footwear.
The plural of radius is radii.
the single form of radii is radius
A hydrogen atom has the smallest radii.
These three radii are of different lengths.
It is radii which is the plural of radius
The covalent radii is for atoms.
The noun radii is already a plural. The singular is radius.