1) Obsolete unit of measurement 2) Unit of area 
as much land as a team of oxen ploughs in a season
• (n.) A plowland; as much land as one team can plow in a year and a day; -- by some said to be about 100 acres.
Car'u·cate noun [ Late Latin carucata , carrucata . See Carucage .] A plowland; as much land as one team can plow in a year and a day; -- by some said to be about 100 acres. Burrill. 
Ancient Measurement Terms: A measurement of land, equal to a hide (used in Dane law).
A danish term equivalent to 120 acres of arable land according to quality. - That, that could be ploughed by a team of eight oxen in a day.
the equivalent of the HIDE, both as a unit of 120 acres for assessing DANGELD in DOMESDAY BOOK and as a real land measure, in the DANELAW; also used elsewhere in ENGLAND in DOMESDAY BOOK as a real measure of land exempt from DANEGELD
A carucate was formerly as much land as one team could plough in one year. The size varied according to the nature of the soil and the practice of husbandry in different districts.