Also found in: Wikipedia.
An ordinary in the form of a triangle issuing from the edge of the escutcheon and coming to a vertex at the fess point.
[Early Modern English, from Middle French giron, from Old French gerun, the part of a garment that hangs down (as in a pointed shape), tail or trimming of a garment, of Germanic origin; akin to Old High German gēro and Middle Dutch ghere, tail of a garment cut in a pointed shape.]
(Heraldry) a variant spelling of giron
gy•ron(ˈdʒaɪ rən, -rɒn)
a triangular heraldic charge with one side at the edge of the field and the apex at the fess point.
[1565–75; < Middle French giron gusset < Frankish; compare Old High German gēro gore3]