a. Her. [a. F. vertant, = L. vertent-, vertens, pres. pple. of vertĕre: see VERT v.1] Bending, curving.

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1688.  R. Holme, Armoury, II. 473/1. He beareth Argent, eight Leaves, the Stalks conjoyned and contrary bowed…. But the most compendious, is to blazon them conjoyn’d dorse endorse: though good Artists will say, conjoyned and vertant to the Dextre and Sinister.

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c. 1828.  Berry, Encycl. Her., I. Gloss., Vertant and Revertant, or Verted and Reverted, the same as flexed and reflexed, or bowed embowed, that is formed like the letter S reverted. [Hence in later Dicts.]

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