vinylidene group

16 LETTERS · STARTS WITH V

vinylidene group is a valid 16-letter word worth 25 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

V4I1N1Y4L1I1D2E1N1E1G2R1O1U1P3

4 + 1 + 1 + 4 + 1 + 1 + 2 + 1 + 1 + 1 + 0 + 2 + 1 + 1 + 1 + 3 =25 PTS

DOUBLE WORD → 50TRIPLE WORD → 75

MEANING

What does vinylidene group mean?