radii

Noun

• The plural form of radius, often used in geometry.
• the length of a line segment between the center and circumference of a circle or sphere
• a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
• a circular region whose area is indicated by the length of its radius
• the outer and slightly shorter of the two bones of the human forearm
• support consisting of a radial member of a wheel joining the hub to the rim
• plural of radius

Examples

• The parallel plays of RADII stretched across the Words With Friends board.
• The radius of the Sun is equal to about 109 Earth radii.

Synonyms

r, radius, spoke, wheel spoke