square inch
Definition
Noun: A unit of area measurement in the Imperial and US customary systems, defined as the area of a square with sides each measuring one inch in length.
Usage
The term "square inch" is used to quantify area, particularly for smaller surfaces. It is commonly abbreviated as sq in or in². It functions as a compound noun where "square" modifies the unit "inch" to specify it is a measure of area, not length.
Examples
- The pressure was measured as 15 pounds per square inch.
- A standard postage stamp has an area of about one square inch.
- The screen has a resolution of 300 pixels per square inch.
- Calculate the area of the rectangle in square inches.
Advanced Usage
- Per square inch: A common phrase used to express density, pressure, or concentration over a given area.
- This fabric has over 200 threads per square inch.
- Square inch of [something]: Used to emphasize a very small area.
- There wasn't a square inch of free space on the wall.
Variants and Related Words
- Square foot (sq ft): A larger unit of area equal to 144 square inches.
- Square centimeter (cm²): A metric unit of area; one square inch is approximately 6.45 square centimeters.
- Area: The general mathematical concept of the extent of a two-dimensional surface.
Synonyms
- in² (The standard symbolic abbreviation).
- sq in (The common textual abbreviation).
Notes
"Square inch" is a fixed compound noun. The plural form is "square inches" (e.g., ten square inches). It is crucial to distinguish it from a linear "inch." For example, a square that is 2 inches on each side has an area of 4 square inches, not 2 square inches.
Noun
-
a unit of area equal to one inch by one inch square
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