drift indicator

15 LETTERS · STARTS WITH D

drift indicator is a valid 15-letter word worth 21 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2R1I1F4T1I1N1D2I1C3A1T1O1R1

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

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does drift indicator mean?