interparenthetical

18 LETTERS · 7 SYLLABLES · STARTS WITH I

interparenthetical is a valid 18-letter word worth 25 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1N1T1E1R1P3A1R1E1N1T1H4E1T1I1C3A1L1

1 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 4 + 1 + 1 + 1 + 3 + 1 + 1 =25 PTS

DOUBLE WORD → 50TRIPLE WORD → 75

MEANING

What does interparenthetical mean?