Part of speech: noun

A straight line from the center of a circle or sphere to its periphery.

Part of speech: noun

The bone of the forearm on the same side as the thumb.

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Usage examples "radius":

  1. Their distance from the centre, compared with the radius of the unflattened circle, is called the excentricity. - "Pioneers of Science", Oliver Lodge.
  2. Not less than fifty other subalterns within a radius of five miles were saying the same thing to their platoons. - "The First Hundred Thousand", Ian Hay.
  3. From that time, every human being that came within her radius was welcome as a new object of love. - "Not Like Other Girls", Rosa N. Carey.