SHORTWAVE
Etymology
Adjective
shortwave (not comparable)
(of radio waves) Having a wavelength of approximately 10 to 100 meters
(of radio equipment) Capable of transmitting or receiving signals at such a wavelength.
Noun
shortwave (plural shortwaves)
An electromagnetic wave having a wavelength between approximately 10 and 100 meters, corresponding to frequencies between 3 and 30 MHz.
(colloquial, usually in plural) Any frequency in this range, especially when used in broadcasting.
(meteorology)
Synonyms
• (wave): decameter wave
• (frequency): high frequency, HF
Source: Wiktionary