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Tetragon

TET'RAGON, n. [Gr. four, and an angle.] 1. In geometry, a figure having four angles; a quadrangle; as a square, a rhombus, _c. 2. In astrology, an aspect of two planets with regard to the earth, when they are...

Webster Dictionary
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Meaning

TET'RAGON, n. [Gr. four, and an angle.]

1. In geometry, a figure having four angles; a quadrangle; as a square, a rhombus, _c.

2. In astrology, an aspect of two planets with regard to the earth, when they are distant from each other ninety degrees, or the fourth of a circle.

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