The radio compasses on the ship were used for navigation.

The radical anions are highly reactive species.

I used to listen to radio cassettes when I was a teenager.

The radio energies emitted by the stars are detected by telescopes.

The radio altimeters are used to measure the height of an aircraft above the ground.

Radio interferometers are used to study celestial objects.

The radio jocks entertained the listeners with their witty banter.

Many people developed radiation sicknesses after the nuclear accident.

Scientists have discovered several radio halos in distant galaxies.

Radio nebulae are formed by the interaction between high-energy particles and magnetic fields.