longitudinal section

20 LETTERS · STARTS WITH L

longitudinal section is a valid 20-letter word worth 23 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

L1O1N1G2I1T1U1D2I1N1A1L1S1E1C3T1I1O1N1

1 + 1 + 1 + 2 + 1 + 1 + 1 + 2 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 3 + 1 + 1 + 1 + 1 =23 PTS

DOUBLE WORD → 46TRIPLE WORD → 69

MEANING

What does longitudinal section mean?