| Look up radius in Wiktionary, the free dictionary. |
A radius is a straight line from the center to the boundary of an object or shape.
Radius may also refer to:
- Radius (bone), one of the two bones in a forearm
- Radius (graph theory), the minimum distance from a graph's node to the node that is farthest from it
- RADIUS, a network authentication protocol
- Radius (computer), a computer hardware firm
- Radius (music ensemble), a London music ensemble founded by Tim Benjamin
- Radius (band), a band from Los Angeles, California
- Radius (comics), a superhero in the Marvel Comics universe
- Radius (Chrono Cross), a character in Chrono Cross
See also
- Radius of curvature, a measure of how gently a curve bends
- Bend radius, the minimum radius one can bend a pipe, tube, sheet, cable or hose without damage
- Radius of convergence (in calculus), the radius of the region where a complex power series converges
- Radius of gyration, the root-mean-square distance from a set of points or masses to a given center
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