radius

Definition

• n. the length of a line segment between the center and circumference of a circle or sphere
• n. a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
• n. a circular region whose area is indicated by the length of its radius
• n. the outer and slightly shorter of the two bones of the human forearm

Word forms

Plural

radii

Example sentences

1. n.

   The radius of the circle is five centimeters.

2. n.

   In electrical engineering, the radius of a wire affects its resistance.