Coolidge tube

noun Physics.
  1. a cathode ray tube, used for x-ray production, in which a beam of thermoelectrons is produced by heating a wire cathode.

Origin of Coolidge tube

1910–15, Americanism; named after William D. Coolidge (1873–1975), U.S. physicist and chemist who devised it
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018