nethermost layer

16 LETTERS · STARTS WITH N

nethermost layer is a valid 16-letter word worth 23 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

N1E1T1H4E1R1M3O1S1T1L1A1Y4E1R1

1 + 1 + 1 + 4 + 1 + 1 + 3 + 1 + 1 + 1 + 0 + 1 + 1 + 4 + 1 + 1 =23 PTS

DOUBLE WORD → 46TRIPLE WORD → 69

MEANING

What does nethermost layer mean?