a sealed tube, usually of glass, containing a vacuum or a gas and electrodes that are connected to pinlike terminals that protrude from the base, used as a plug-in component in an electronic device to control the flow of electrons
"electron tube." YourDictionary, n.d. Web. 11 October 2018. <http://www.yourdictionary.com/electron-tube>.
electron tube. (n.d.). Retrieved October 11th, 2018, from http://www.yourdictionary.com/electron-tube
A sealed enclosure, either highly evacuated or containing a controlled quantity of gas, in which electrons can be made sufficiently mobile to act as the principal carriers of current between at least one pair of electrodes.
Radio Corporation of America (RCA) was formed in 1919 and sold to GE in 1986. The RCA Victor brand evolved from the 1929 acquisition of the Victor Talking Machine Company and has been used for decades to brand vacuum tubes and phonograph records.