Meanings

radioactive material

setting free a bird

radiator

released goods

radio drama

radioactive contamination

radiation

pyromania

continuing education courses offered via radio or television

radioisotope

radiation therapy

loud singing

battery (of artillery, cameras, etc.)

broadcasting satellite

radioactive rain

discharge tube

drainpipe

boldness

radioelement

movements for sending young people to the countryside in China (1937, 1957, 1968)