from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Plural form of vacuum tube.


Sorry, no etymologies found.


  • (Camoens) and professor of German literature (1859-1905); and especially Johann Wilhelm Hittorf, since 1852 professor of physics and chemistry, who discovered the cathode rays, and made valuable investigations concerning electric phenomena in vacuum tubes and contributions to the theory of ions.

    The Catholic Encyclopedia, Volume 10: Mass Music-Newman


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