traveling-wave tube

[ trav-uh-ling-weyv, trav-ling- ]
/ ˈtræv ə lɪŋˈweɪv, ˈtræv lɪŋ- /

noun Electronics.

an electron tube used in microwave communications systems, having an electron beam directed coaxially through a wire helix to produce amplification.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019