principal diagonal

NOUN /prɪnsəpəl_daɪ'æɡənəl/
18 LETTERS · STARTS WITH P

principal diagonal is a valid 18-letter word worth 25 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
P3R1I1N1C3I1P3A1L1D2I1A1G2O1N1A1L1
3 + 1 + 1 + 1 + 3 + 1 + 3 + 1 + 1 + 0 + 2 + 1 + 1 + 2 + 1 + 1 + 1 + 1 =25 PTS
DOUBLE WORD → 50TRIPLE WORD → 75
MEANING

What does principal diagonal mean?

NOUN · 1 SENSE
1

The diagonal of a square matrix running from the upper left entry to the lower right entry.

BROADER