compression coupling

20 LETTERS · STARTS WITH C

compression coupling is a valid 20-letter word worth 30 points in Scrabble and 40 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3O1M3P3R1E1S1S1I1O1N1C3O1U1P3L1I1N1G2

3 + 1 + 3 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 3 + 1 + 1 + 1 + 2 =30 PTS

DOUBLE WORD → 60TRIPLE WORD → 90

MEANING

What does compression coupling mean?