Radius
Radius might refer to:

 Radius (bone), a bone in a Human forearm
 Radius (geometry), a measurement of a circle's size
 Blast radius, the measurement of an explosive's damage area
 Burst radius, a phenomenon associated with supernovae
 Dimensional radius
 Dispersal radius
 Support radius

See also
 Radial force compensator
 Radial geodesic
 Radial imbalance
 Radial line
 Radial wall