Crossword clues for the word: CATHODERAY The word CATHODERAY has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for CATHODERAY Showing 1 to 5 of 5 results Clue(s) Beam in a vacuum tube Crookes tube emission Sir William Crookes discovery of 1879 TV tube emission Type of electronic tube