Define radiuses. radiuses synonyms, radiuses pronunciation, radiuses translation, English dictionary definition of radiuses. n. pl. ra·di·i or ra·di·us·es 1. Abbr. r or rad. Mathematics a. A line segment that joins the center of a circle with any po
The meaning of RADIUS is a line segment extending from the center of a circle or sphere to the circumference or bounding surface. How to use radius in a sentence.