longitudinal wave

17 LETTERS · STARTS WITH L

longitudinal wave is a valid 17-letter word worth 24 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

L1O1N1G2I1T1U1D2I1N1A1L1W4A1V4E1

1 + 1 + 1 + 2 + 1 + 1 + 1 + 2 + 1 + 1 + 1 + 1 + 0 + 4 + 1 + 4 + 1 =24 PTS

DOUBLE WORD → 48TRIPLE WORD → 72

MEANING

What does longitudinal wave mean?