Part of speech:

Four- sided.

Part of speech: noun

A four- sided figure.

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Usage examples "quadrilateral":

  1. This secured them against any immediate attack from the Quadrilateral. - "The Development of the European Nations, 1870-1914 (5th ed.)", John Holland Rose.
  2. The Austrian fleet continued at anchor in the harbor of Trieste, and the army of the Mincio remained inactive, although, as may be supposed, indignant, in its quadrilateral, until Italian unity became a reality, and coalesced with Prussia in order to expel it. - "Pius IX. And His Time", The Rev. Æneas MacDonell Dawson.
  3. A quadrilateral is a plane figure having four sides and four angles. - "The Century Handbook of Writing", Garland Greever Easley S. Jones.