What is "square inch"

n. A unit of area equal to the area of a square the sides of which are each one inch long.

n. a unit of area equal to one inch by one inch square [syn: sq in]

A square inch (plural: square inches) is a unit of area, equal to the area of a square with sides of one inch. The following symbols are used to denote square inches:

• square in
• sq inches, sq inch, sq in
• inches/-2, inch/-2, in/-2
• inches^2, inch^2, in^2
• inches, inch, in

or in some cases "^2

The square inch is a common unit of measurement in the United States and the United Kingdom.