radi - reac
- radial
- radial acceleration
- radial astigmatism
- radial beam emittance
- radial bearing
- radial betatron oscillations
- radial blanket
- radial chamber
- radial clearance
- radial component
- radial coordinates
- radial defocusing
- radial dependence
- radial diffusion
- radial direction
- radial displacement
- radial distribution
- radial distribution function
- radial field
- radial flow
- radial fluid flow
- radial focusing
- radial force
- radial function
- radial grin
- radial injection
- radial instability
- radial lead
- radial lens
- radial load
- radial loading
- radial missing
- radial mode
- radial moiré gauge
- radial momentum
- radial motion
- radial node
- radial orbit excursion
- radial orbital stability
- radial oscillations