Covered with gyrons, or divided so as to form several gyrons; -- said of an escutcheon.

The heraldic way of solving this is applying the usual rules of pre-eminence to partitions, successively. In a quartered banner-of-arms, for instance, the dexter chief (i.e.. top hoist) quarter would be described first. In a gyronny of eight banner-of-arms, one should (a) take only the top hoist quarter (b) consider it is divided "per bend" and hence describe first the top (chief) triangle. If it were a gyronny of sixteen, on top of the "bend" would be two triangles, so the one dexter (i.e.. to the hoist) would go first. If the gyronny is such that one of the gyrons fits the top hoist corner, that one goes first. In practice, the first gyron is the one which occupies the area immediately to the right of the top hoist corner -- whether such gyron starts there or occupies also the contiguous area below the top hoist corner.

a term taken from heraldry, describing a field divided by three or more lines crossing at the center. Gyronny fields are usually divided into eight parts, but other numbers occur.