What does the word radius mean?

Usage examples for radius

  1. Their distance from the centre, compared with the radius of the unflattened circle, is called the excentricity. – Pioneers of Science by 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 by 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 by Rosa N. Carey