Clue: Vacuum tube filler

Answer: ARGON

Length: 5

---

Similar Clues:

• One vacuum tube (ATRIODE with 7 letters)
• Vacuum tube type (e.g. CATHODERAY with 10 letters)
• Element in vacuum tube filaments (THORIUM with 7 letters)
• Certain vacuum tube (TRIODE with 6 letters)
• Inert gas in vacuum tubes (NEON with 4 letters)
• Giant with 17,468 vacuum tubes (ENIAC with 5 letters)
• Pastry-tube filler (ICING with 5 letters)
• Glass tube filler (NEON with 4 letters)
• Computer with 18,000 vacuum tubes (ENIAC with 5 letters)
• Vacuum-tube gas (ARGON with 5 letters)