cathode glow

12 LETTERS · STARTS WITH C

cathode glow is a valid 12-letter word worth 21 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3A1T1H4O1D2E1G2L1O1W4

3 + 1 + 1 + 4 + 1 + 2 + 1 + 0 + 2 + 1 + 1 + 4 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does cathode glow mean?