![traveling-wave tube traveling-wave tube](https://www.tekportal.net/wp-content/uploads/2018/12/traveling-wave-tube.png)
traveling-wave tube [trav-uh-ling-weyv, trav-ling-] noun Electronics.
- an electron tube used in microwave communications systems, having an electron beam directed coaxially through a wire helix to produce amplification.
traveling-wave tube [trav-uh-ling-weyv, trav-ling-] noun Electronics.