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The Collaborative International Dictionary
Brisure

Brisure \Bri*sure"\, n. [F.]

  1. (Fort.) Any part of a rampart or parapet which deviates from the general direction.

  2. (Her.) A mark of cadency or difference.

Wiktionary
brisure

n. 1 Any part of a rampart or parapet which deviates from the general direction. 2 (context heraldry English) A mark of cadency or difference.