book isinglass

14 LETTERS · STARTS WITH B

book isinglass is a valid 14-letter word worth 20 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

B3O1O1K5I1S1I1N1G2L1A1S1S1

3 + 1 + 1 + 5 + 0 + 1 + 1 + 1 + 1 + 2 + 1 + 1 + 1 + 1 =20 PTS

DOUBLE WORD → 40TRIPLE WORD → 60

MEANING

What does book isinglass mean?