astronomical clock

18 LETTERS · STARTS WITH A

astronomical clock is a valid 18-letter word worth 29 points in Scrabble and 36 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

A1S1T1R1O1N1O1M3I1C3A1L1C3L1O1C3K5

1 + 1 + 1 + 1 + 1 + 1 + 1 + 3 + 1 + 3 + 1 + 1 + 0 + 3 + 1 + 1 + 3 + 5 =29 PTS

DOUBLE WORD → 58TRIPLE WORD → 87

MEANING

What does astronomical clock mean?