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

Hilary Rodham Clinton

wife of President Clinton and later a woman member of the United States Senate (1947-)