A radio transmitter is a device that sends out signals that can be picked up by a radio receiver. It is like a messenger that sends information through the air using radio waves. Full definition
One cell displays a pedestal holding a handmade radio transmitter hidden inside the carved - out pages of a book. (philly.com)
Scientists have captured wolverines and let them go with radio transmitters attached. (discovermagazine.com)
In view of these circumstances, which should be common to and deducible by all the civilizations in our galaxy, it seems to us quite possible that one - way radio messages are being beamed at the earth at this moment by radio transmitters on planets in orbit around other stars. (scientificamerican.com)