Decorated with a series of small curved notches or indentations along the edge, especially in heraldry.
Past participle of 'engrail,' meaning something that has been given an engrailed edge. The decorative pattern appears in heraldic shields and manuscripts from medieval times.
An engrailed shield edge signaled craftsmanship and expense—those tiny scallops had to be carved or drawn by hand, so an engrailed border literally advertised that you could afford fancier ornamentation.
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