1. Resembling or in the form of an umbel

See also: umbel

• radio reflector
• radio set
• radio signal
• radio source
• radio spectrum
• radio station
• radio telescope
• radio transmitter
• radio wave
• radio-controlled
• radio-controlled aircraft
• radio-frequency spectrum
• radio-gramophone
• radio-opacity
• radio-opaque
• radio-phonograph
• radioactive
• radioactive dating
• radioactive decay
• radioactive dust
• radioactive iodine excretion test
• radioactive iodine test
• radioactive iodine uptake test
• radioactive material
• radioactive tracer