main diagonal

noun

Mathematics.

1. diagonal9

Example Sentences

The darkest squares along the main diagonal represent spots of closest interaction.

From Nature

Her design kept the main diagonal entry street onto the property and a parking garage, but installed sports fields where the lagoon now is.

From Washington Times

However, place a rook on each square of the main diagonal — we have eight rooks, none of which are attacking each other.

From New York Times