gyron
/ˈdʒaɪrɑn/
noun
- A triangular area in heraldry, typically formed by lines from the edge of the shield to the center.
- The coat of arms had eight gyrons alternating in red and white.
- The knight's shield featured a gold gyron on a blue background.
- The heraldic designer carefully painted each gyron to meet at the center of the shield.