dibranchiate mollusk

NOUN
20 LETTERS · STARTS WITH D

dibranchiate mollusk is a valid 20-letter word worth 33 points in Scrabble and 39 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2I1B3R1A1N1C3H4I1A1T1E1M3O1L1L1U1S1K5
2 + 1 + 3 + 1 + 1 + 1 + 3 + 4 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 5 =33 PTS
DOUBLE WORD → 66TRIPLE WORD → 99
MEANING

What does dibranchiate mollusk mean?

NOUN · 1 SENSE
1

Cephalopods having two gills.