circular letter

15 LETTERS · STARTS WITH C

circular letter is a valid 15-letter word worth 18 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3I1R1C3U1L1A1R1L1E1T1T1E1R1

3 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 1 =18 PTS

DOUBLE WORD → 36TRIPLE WORD → 54

MEANING

What does circular letter mean?