tetragon
nounCA, US /ˈtɛ.tɹə.ɡɒn/ · UK /ˈtɛ.tɹə.ɡən/
Etymology From Ancient Greek τετράγωνος (tetrágōnos). By surface analysis, tetra- + -gon.
1
Geometry, Mathematics, Sciences Rare 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.
- In the horoscope of Christ's nativity.[…]Whether a trigon or no, this tetragon I am sure there was.a. 1626, Bishop Andrewes, Sermon:
- Synonyms
- quadrangle, quadrilateral
- Derived terms
- tetragonal, Tetragonopterus