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The Collaborative International Dictionary
Three-square

Square \Square\ (skw[^a]r), a.

  1. (Geom.) Having four equal sides and four right angles; as, a square figure.

  2. Forming a right angle; as, a square corner.

  3. Having a shape broad for the height, with rectilineal and angular rather than curving outlines; as, a man of a square frame.

  4. Exactly suitable or correspondent; true; just.

    She's a most triumphant lady, if report be square to her.
    --Shak.

  5. Rendering equal justice; exact; fair; honest; as, square dealing.

  6. Even; leaving no balance; as, to make or leave the accounts square.

  7. Leaving nothing; hearty; vigorous.

    By Heaven, square eaters. More meat, I say.
    --Beau. & Fl.

  8. (Naut.) At right angles with the mast or the keel, and parallel to the horizon; -- said of the yards of a square-rigged vessel when they are so braced.

    Note: Square is often used in self-explaining compounds or combinations, as in square-built, square-cornered, square-cut, square-nosed, etc.

    Square foot, an area equal to that of a square the sides of which are twelve inches; 144 square inches.

    Square knot, a knot in which the terminal and standing parts are parallel to each other; a reef knot. See Illust. under Knot.

    Square measure, the measure of a superficies or surface which depends on the length and breadth taken conjointly. The units of square measure are squares whose sides are the linear measures; as, square inches, square feet, square meters, etc.

    Square number. See Square, n., 6.

    Square root of a number or Square root of a quantity (Math.), that number or quantity which, multiplied by itself, produces the given number or quantity.

    Square sail (Naut.), a four-sided sail extended upon a yard suspended by the middle; sometimes, the foresail of a schooner set upon a yard; also, a cutter's or sloop's sail boomed out. See Illust. of Sail.

    Square stern (Naut.), a stern having a transom and joining the counter timbers at an angle, as distinguished from a round stern, which has no transom.

    Three-square, Five-square, etc., having three, five, etc., equal sides; as, a three-square file.

    To get square with, to get even with; to pay off. [Colloq.]

Three-square

Three-square \Three"-square`\, a. Having a cross section in the form of an equilateral triangle; -- said especially of a kind of file.

Wiktionary
three-square

a. Having a cross section in the form of an equilateral triangle; said especially of a kind of file.

Usage examples of "three-square".

I can envision a situation where we have all the recordings needed for a three-square of movies—but a few survivors still retain some technology.