diurnal arc

11 LETTERS · STARTS WITH D

diurnal arc is a valid 11-letter word worth 13 points in Scrabble and 17 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2I1U1R1N1A1L1A1R1C3

2 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 3 =13 PTS

DOUBLE WORD → 26TRIPLE WORD → 39

MEANING

What does diurnal arc mean?