gyron
noun
gy·ron
variants or giron
ˈjīrən,
-ˌrän
plural -s
: a heraldic charge of triangular form having one side at the edge of the field and the opposite angle usually at the fess point
Word History
Etymology
Middle French giron wedge-shaped piece of material, from Old French, of Germanic origin; akin to Old High German gēro wedge-shaped object