Scrabble?! RADIUS

Definitions of RADIUS in various dictionaries:

noun - the length of a line segment between the center and circumference of a circle or sphere

noun - a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)

noun - a circular region whose area is indicated by the length of its radius

noun - the outer and slightly shorter of the two bones of the human forearm

noun - support consisting of a radial member of a wheel joining the hub to the rim

R, r, rad.

A line segment that joins the center of a circle with any point on its circumference.

A line segment that joins the center of a sphere with any point on its surface.

A line segment that joins the center of a regular polygon with any of its vertices.

The length of any such line segment.

A circular area measured by a given radius: every family within a radius of 25 miles of the city center.

A bounded range of effective activity or influence: the operating radius of a helicopter.

A radial part or structure, such as a mechanically pivoted arm or the spoke of a wheel.

Anatomy.

A long, prismatic, slightly curved bone, the shorter and thicker of the two forearm bones, located on the lateral side of the ulna.

A similar bone in many vertebrates.

noun - a straight line from the center of a circle to the circumference