dispersion hardening

20 LETTERS · STARTS WITH D

dispersion hardening is a valid 20-letter word worth 27 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2I1S1P3E1R1S1I1O1N1H4A1R1D2E1N1I1N1G2

2 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 4 + 1 + 1 + 2 + 1 + 1 + 1 + 1 + 2 =27 PTS

DOUBLE WORD → 54TRIPLE WORD → 81

MEANING

What does dispersion hardening mean?