tetragon

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English[edit]

Noun[edit]

tetragon (plural tetragons)

  1. (geometry, rare) A quadrilateral.
  2. An aspect of two planets with regard to the Earth when they are distant from each other ninety degrees, or a quarter-circle.
    (Can we find and add a quotation of Hutton to this entry?)

Usage notes[edit]

Although consistent with pentagon, hexagon, etc., this term is not common; quadrilateral is the more common term.

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