noun Date: 1932 a device (as a duct, coaxial cable, or glass fiber) designed to confine and direct the propagation of electromagnetic waves (as light)
WAVEGUIDE
Meaning of WAVEGUIDE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012