'X-ray tube' definitions:
Definition of 'X-ray tube'
(from WordNet)
noun
A vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays
Definition of 'X-ray tube'
From: GCIDE
- X-ray tube \X"-ray` tube\ (Physics) A vacuum tube suitable for producing Roentgen rays. [Webster 1913 Suppl.]