sidereal clock

14 LETTERS · STARTS WITH S

sidereal clock is a valid 14-letter word worth 22 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1I1D2E1R1E1A1L1C3L1O1C3K5

1 + 1 + 2 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 3 + 5 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does sidereal clock mean?