medium wave

Từ điển Oxford Learners Wordfinder Dictionary

noun

a radio wave with a wavelength between 100 and 1000 meters (a frequency between 300 kilohertz and 3000 kilohertz)
• Regions:
United Kingdom, UK, U.K., Britain, United Kingdom of Great Britain and Northern Ireland, Great Britain
• Hypernyms:
radio wave, radio emission, radio radiation