from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An early electronic device incorporating electrons from a glowing cathode inside an evacuated glass tube; functioned as a switch, amplifier etc.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
Sorry, no etymologies found.