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Definition of X-RAY TUBE
: a vacuum tube in which a concentrated stream of electrons strikes a metal target and produces X-rays
First Known Use of X-RAY TUBE
Medical Definition of X–RAY TUBE
: a vacuum tube in which a concentrated stream of electrons from a cathode strikes a metal target and produces X-rays from the side of the tube at right angles in a quantity and intensity that is controlled by the cathode temperature and with a wavelength and hardness that depends upon the voltage applied to the tube terminals