arpent

l'arpent (FR N-M) ancient measure of land area, one »arpent« being about 100 »perches« long on each side, or 20 to 50 square ares (metric, equivalent to approximately 215 to about 538 square feet). First appears in French in 1080, from Latin arependis, arepennis, Gallic origins. (Eluard)