marking gauge

13 LETTERS · STARTS WITH M

marking gauge is a valid 13-letter word worth 21 points in Scrabble and 27 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

M3A1R1K5I1N1G2G2A1U1G2E1

3 + 1 + 1 + 5 + 1 + 1 + 2 + 0 + 2 + 1 + 1 + 2 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does marking gauge mean?