unit, unit of measurement - any division of quantity accepted as a standard of measurement or exchange; "the dollar is the United States unit of currency"; "a unit of wheat is a bushel"; "change per unit volume"

sq in, square inch - a unit of area equal to one inch by one inch square

sq ft, square foot - a unit of area equal to one foot by one foot square

sq yd, square yard - a unit of area equal to one yard by one yard square

centare, square meter, square metre - a centare is 1/100th of an are

square mile - an area of 640 acres

quarter section - a land unit equal to a quarter of a section (160 acres) and measuring 1/2 mile on a side

acre - a unit of area (4840 square yards) used in English-speaking countries

are, ar - a unit of surface area equal to 100 square meters

hectare - (abbreviated `ha') a unit of surface area equal to 100 ares (or 10,000 square meters)

arpent - a former French unit of area; equal approximately to an acre

barn, b - (physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter

dessiatine - a former Russian unit of area equal to 2.7 acres

morgen - a South African unit of measure equal to about 2 acres

perch, rod, pole - a square rod of land

em, mut, mutton - the square of a body of any size of type

agate line, line - space for one line of print (one column wide and 1/14 inch deep) used to measure advertising

column inch, inch - a unit of measurement for advertising space