dirigible balloon

17 LETTERS · STARTS WITH D

dirigible balloon is a valid 17-letter word worth 22 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2I1R1I1G2I1B3L1E1B3A1L1L1O1O1N1

2 + 1 + 1 + 1 + 2 + 1 + 3 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 1 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does dirigible balloon mean?