astronomical day

16 LETTERS · STARTS WITH A

astronomical day is a valid 16-letter word worth 23 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

A1S1T1R1O1N1O1M3I1C3A1L1D2A1Y4

1 + 1 + 1 + 1 + 1 + 1 + 1 + 3 + 1 + 3 + 1 + 1 + 0 + 2 + 1 + 4 =23 PTS

DOUBLE WORD → 46TRIPLE WORD → 69

MEANING

What does astronomical day mean?