ratchet coupling

16 LETTERS · STARTS WITH R

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

SCRABBLE WORDS WITH FRIENDS
R1A1T1C3H4E1T1C3O1U1P3L1I1N1G2
1 + 1 + 1 + 3 + 4 + 1 + 1 + 0 + 3 + 1 + 1 + 3 + 1 + 1 + 1 + 2 =25 PTS
DOUBLE WORD → 50TRIPLE WORD → 75
MEANING

What does ratchet coupling mean?

1