radi - rece
- radial
- radian angular frequency
- radian frequency
- radiant energy
- radiant flux
- radiant flux density
- radiant intensity
- radiated power
- radiating aerial
- radiating antenna
- radiating curtain
- radiating double dipole
- radiating doublet
- radiating waveguide
- radiation
- radiation angle
- radiation coupling
- radiation diagram
- radiation effect
- radiation efficiency
- radiation excitation
- radiation field
- radiation lobe
- radiation loss
- radiation pattern
- radiation potential
- radiation resistance
- radiation-coupled reflector
- radiator
- radical change
- radio
- radio altimeter
- radio beacon
- radio beacon with double modulation
- radio beam
- radio channel
- radio circuit
- radio communication link
- radio communications
- radio control
