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arpent d’ordonnance

A unit of land area in France before the 19ᵗʰ century = 100 square perche d’ordonnance, approximately 1.26 acres. It was used mostly for wooded land. See arpent. The perche d’ordonnance was 22 pied du roi.

Also known as the arpent des eaux et forêts, the grand arpent, and the arpent de roi.