X-ray tube

noun

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

1896, in the meaning defined above

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The first known use of X-ray tube was in 1896

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X-ray tube

noun

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

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