# radii

ra·di·i*alt. pl. of*radius

## radii

noun

A plural of radius

## radii

Noun

- plural form of
*radius*

- Circles of these
**radii**are usually marked around the jack for convenience' sake. - The resistance to motion round a curve has not been so systematically studied that any definite rule can be formulated applicable to all classes of rolling stock and all
**radii**of curves. - It is the envelope of circles described on the central
**radii**of an ellipse as diameters. - Representing by P this position, it follows that the area of that portion of the ellipse contained between the
**radii**vectores FB and FP will bear the same ratio to the whole area of the ellipse that t does to T, the time of revolution. - In diameter, sometimes surmounted by trees in the midst of a treeless plain and sometimes arranged in circles and on
**radii**, and decreasing in size with distance from the centre of the field - has been variously explained.

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