illuminating gas

16 LETTERS · STARTS WITH I

illuminating gas is a valid 16-letter word worth 19 points in Scrabble and 27 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1L1L1U1M3I1N1A1T1I1N1G2G2A1S1

1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 2 + 0 + 2 + 1 + 1 =19 PTS

DOUBLE WORD → 38TRIPLE WORD → 57

MEANING

What does illuminating gas mean?