diagonal matrix

NOUN
15 LETTERS · STARTS WITH D

diagonal matrix is a valid 15-letter word worth 25 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2I1A1G2O1N1A1L1M3A1T1R1I1X8
2 + 1 + 1 + 2 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 8 =25 PTS
DOUBLE WORD → 50TRIPLE WORD → 75
MEANING

What does diagonal matrix mean?

NOUN · 1 SENSE
1

A square matrix with all elements not on the main diagonal equal to zero.