What is "houston acres"

Population (2000): 491
Housing Units (2000): 226
Land area (2000): 0.147728 sq. miles (0.382615 sq. km)
Water area (2000): 0.000000 sq. miles (0.000000 sq. km)
Total area (2000): 0.147728 sq. miles (0.382615 sq. km)
FIPS code: 38170
Located within: Kentucky (KY), FIPS 21
Location: 38.216270 N, 85.613560 W
ZIP Codes (1990):
Note: some ZIP codes may be omitted esp. for suburbs.
Headwords: