1911 Encyclopædia Britannica/Carucate
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CARUCATE, or Carrucate (from the Med. Lat. carrucata, from carruca, a wheeled plough), a measure of land, based probably on the area that could be ploughed by a team of oxen in a year; hence “carucage” means a tax levied on each “carucate” of land (see Hide).