concertina movement

19 LETTERS · STARTS WITH C

concertina movement is a valid 19-letter word worth 29 points in Scrabble and 37 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
C3O1N1C3E1R1T1I1N1A1M3O1V4E1M3E1N1T1
3 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 4 + 1 + 3 + 1 + 1 + 1 =29 PTS
DOUBLE WORD → 58TRIPLE WORD → 87
MEANING

What does concertina movement mean?

1