thermionic vacuum tube

NOUN
22 LETTERS · STARTS WITH T

thermionic vacuum tube is a valid 22-letter word worth 36 points in Scrabble and 45 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
T1H4E1R1M3I1O1N1I1C3V4A1C3U1U1M3T1U1B3E1
1 + 4 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 3 + 0 + 4 + 1 + 3 + 1 + 1 + 3 + 0 + 1 + 1 + 3 + 1 =36 PTS
DOUBLE WORD → 72TRIPLE WORD → 108
MEANING

What does thermionic vacuum tube mean?

NOUN · 1 SENSE
1

Electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope.

SYNONYMS
ELECTRON TUBETHERMIONIC TUBETHERMIONIC VALVETUBEVACUUM TUBE
BROADER
ELECTRONIC DEVICE
NARROWER
ACORN TUBEMAGNETRONPENTODERECTIFYING TUBERECTIFYING VALVETELEVISION-CAMERA TUBETELEVISION PICKUP TUBETETRODE