In heraldry, a decorative design element shaped like a fleur-de-lis (a stylized lily flower) appearing at the corners or ends of a shield or border.
From Old French 'fleur' meaning 'flower,' ultimately from Latin 'flos.' The term describes ornamental fleur-de-lis designs that became standard in medieval heraldic decoration, particularly in French and European coats of arms.
Medieval knights had their own design language—'fleury' borders on shields were like a signature saying 'I'm fancy and connected to French nobility!' The fleur-de-lis shows up everywhere in heraldry because it became a symbol of power and elegance.
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