Correct spelling for X-rays

Medical definition of X-rays:

The ethereal waves or pulsations emitted from a Crookes' tube, excited by the bombardment of the anode target with the cathode rays; they are believed to be a series of short pulsations following each other at irregular intervals.

Roentgen rays; see under ray.

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1. To pierce with a narrow pointed instrument, as a knife or dagger. 2. A stab wound. 3. A stab culture. ...