Radius Definition

rādē-əs
radii, radiuses
noun
radii, radiuses
Any straight line extending from the center to the periphery of a circle or sphere.
Webster's New World
A line segment that joins the center of a sphere with any point on its surface.
American Heritage
A line segment that joins the center of a regular polygon with any of its vertices.
American Heritage
The length of such a line.
Webster's New World
A raylike or radial part, as a spoke of a wheel.
Webster's New World
Synonyms:

Other Word Forms of Radius

Noun

Singular:
radius
Plural:
radii, radiuses

Origin of Radius

  • Latin ray, spoke of a wheel, radius

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin radius (“ray")

    From Wiktionary

Radius Sentence Examples

  • Atlanta was laid out in the form of a circle, the radius being 14 m.

  • A semicircle is then drawn behind the bowls with a radius of 9 ft.

  • The distance of the lucid points was the tangent of the magnified angles subtended by the stars to a radius of io ft.

  • As the entire time required for light to pass over the radius of the earth's orbit is only about 500 seconds, this error is fatal to the method.

  • The chief difference between the first three types lies in the weight of rails and rolling stock and in the radius of the curves.

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Words Starting With

RRARAD

Words Ending With

SUSIUS

Unscrambles

radius

Words Starting With R and Ending With S

Starts With R & Ends With SStarts With RA & Ends With SStarts With R & Ends With US

Word Length

6 Letter Words6 Letter Words Starting With R6 Letter Words Ending With S