The Collaborative International Dictionary
Saltirewise
Saltirewise \Sal"tire*wise`\, adv. (Her.) In the manner of a saltire; -- said especially of the blazoning of a shield divided by two lines drawn in the direction of a bend and a bend sinister, and crossing at the center.
Wiktionary
saltirewise
adv. (context heraldry English) In the form of a saltire; crossing diagonally.