master clock

12 LETTERS · STARTS WITH M

master clock is a valid 12-letter word worth 21 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

M3A1S1T1E1R1C3L1O1C3K5

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

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does master clock mean?