Crossword puzzle clue "gas in a vacuum tube"

Here are the possible solutions for gas in a vacuum tube clue

Answer
Clue
Relevancy
argo
Clue
Gas in a vacuum tube
argon
Clue
Vacuum tube gas
Vacuum-tube gas
Definition
an inert gaseous element
anode
Clue
Vacuum tube part
___ dark space (region in a vacuum tube)
Vacuum tube part.
Definition
a positively charged electrode
anodes
Clue
Vacuum tube terminals
Vacuum tube parts
Definition
ANODE, a positively charged electrode

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