A large quantity.
Any of various similar units of area in other systems.
An English unit of land area (symbol: a. or ac.) originally denoting a day's ploughing for a yoke of oxen, now standardized as 4,840 square yards or 4,046.86 square meters.
A wide expanse.
An area of 10,240 square yards or 4 quarters.
A one-hundred dollar banknote.
The lowest note of an instrument, written below the staff and the D note.