In heraldry and heraldic vexillology, a blazon is a formal description of a coat of arms, flag or similar emblem, from which the reader can reconstruct the appropriate image. The visual depiction of a coat of arms or flag traditionally has considerable latitude in design, while a blazon specifies the essentially distinctive elements; thus it can be said that a coat of arms or flag is primarily defined not by a picture but rather by the wording of its blazon (though often flags are in modern usage additionally and more precisely defined using geometrical specifications).
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