Definition of

X-ray Tube

  1. (noun, artifact) a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays

via WordNet, Princeton University

Note: If you're looking to improve your vocabulary right now, we highly recommend Ultimate Vocabulary Software.

Word of the Moment

Extortionist

a criminal who extorts money from someone by threatening to expose embarrassing information about them