square
n.— «This time last year, roof repairs generally cost $180 to $240 per every 100 square feet, or what the industry calls a “square,” said Aaron Anders, who owns a local roofing company. Today, he said, roof work costs from $240 to $300 per square.» —“Homeowners, insurers increasingly dispute roof repairs” by Purva Patel Houston Chronicle (Texas) Dec. 12, 2008. (source: Double-Tongued Dictionary)