radio radiation

Từ điển WordNet v3.1 - WordNet Dictionary

noun

an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m (Freq. 2)
• Syn:
radio wave, radio emission
• Hypernyms:
electromagnetic radiation, electromagnetic wave, nonparticulate radiation
• Hyponyms:
sky wave, ground wave, radio signal, carrier wave, carrier,
short wave, medium wave, long wave
• Part Holonyms:
radio spectrum, radio-frequency spectrum