ground layer

12 LETTERS · STARTS WITH G

ground layer is a valid 12-letter word worth 16 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

G2R1O1U1N1D2L1A1Y4E1R1

2 + 1 + 1 + 1 + 1 + 2 + 0 + 1 + 1 + 4 + 1 + 1 =16 PTS

DOUBLE WORD → 32TRIPLE WORD → 48

MEANING

What does ground layer mean?