skin friction

13 LETTERS · STARTS WITH S

skin friction is a valid 13-letter word worth 21 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1K5I1N1F4R1I1C3T1I1O1N1

1 + 5 + 1 + 1 + 0 + 4 + 1 + 1 + 3 + 1 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does skin friction mean?