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Clue: "Gas in a vacuum tube"
"Gas in a vacuum tube" is a New York Times crossword puzzle clue that we have seen 1 time.
Possible answer
ARGON
Likely related crossword puzzle clues
Inert gas
Laser gas
Number 18
It's inert
Light bulb gas
Radio tube gas
Vacuum tube filler
Most common inert gas
Most common noble gas
<--, on the periodic table
Part of the atmosphere
Fluorescent bulb filler
Fluorescent lamp filler
Its atomic number is 18
About 1% of the atmosphere
Show more
Recent usage in crossword puzzles
New York Times -
June 23, 2013