Radius (disambiguation)
- Alexandra Radius
- Bend radius
- Cylindrical coordinate system
- Justus Radius
- Polar coordinate system
- R.U.R.
- RADIUS
- Radius (Chrono Cross)
- Radius (bone)
- Radius (comics)
- Radius (film)
- Radius (graph theory)
- Radius (music ensemble)
- Radius Inc.
- Radius Intelligence
- Radius Payment Solutions
- Radius Prawiro
- Radius Travel
- Radius of convergence
- Radius of curvature
- Radius of gyration
- Spherical coordinate system
- Turning radius