Definition of "Tesla tube"

It would be a convenience if some short name could be found for vacuum tubes without electrodes. These were referred to by several speakers at the British Association, both in Papers and in discussion. They have been used for years; but it will be conceded, even by those who, like Dr. Bottomley, have used them largely, that before Tesla's experiments not much attention had been paid to them, and it can be denied by none that he has outstripped all in the brilliant effects which he has produced. The word "vacuum tube" has become more common than "Geissler tube"; but why not use the name "Tesla tube" for one without electrodes, leaving vacuum tube to include both kinds?