tetragon

• POS: Noun
• HYPHEN: tet=ra=gon

CIDE DICTIONARY

tetragon, n. [L. tetragonum, Gr. tetra`gwnon; te`tra- (see Tetra-) + gwni`a corner, angle: cf. F. tétragone.].

•  A plane figure having four sides and angles; a quadrangle, as a square, a rhombus, etc.  [1913 Webster]
•  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.  Hutton.  [1913 Webster]

OXFORD DICTIONARY

tetragon, n. a plane figure with four angles and four sides.

Etymology

Gk tetragonon quadrangle (as TETRA-, -GON)

ROGET THESAURUS

tetragon

Four

N quaternity, four, tetrad, quartet, quaternion, square, quarter, tetract, tetragon, quadrangle, rectangle, tetrahedron, quadrature, quadrifoil, quadriform, quadruplet, quatrefoil, tetrapod, quadrangle, quad, quadrupole, quadrivium, four, quaternary, quaternal, quadratic, quartile, tetract, tetractic, tetractinal, tetrad, tetragonal, square, quadrate.