poisson's ratio

15 LETTERS · STARTS WITH P

poisson's ratio is a valid 15-letter word worth 15 points in Scrabble and 17 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
P3O1I1S1S1O1N1'0S1R1A1T1I1O1
3 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 0 + 1 + 1 + 1 + 1 + 1 =15 PTS
DOUBLE WORD → 30TRIPLE WORD → 45
MEANING

What does poisson's ratio mean?

1