gravity ventilation

19 LETTERS · STARTS WITH G

gravity ventilation is a valid 19-letter word worth 28 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

G2R1A1V4I1T1Y4V4E1N1T1I1L1A1T1I1O1N1

2 + 1 + 1 + 4 + 1 + 1 + 4 + 0 + 4 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =28 PTS

DOUBLE WORD → 56TRIPLE WORD → 84

MEANING

What does gravity ventilation mean?