tetragonal

• POS: Adjective
• HYPHEN: te=trag=o=nal

CIDE DICTIONARY

tetragonal, a. 

•  Of or pertaining to a tetragon; having four angles or sides; thus, the square, the parallelogram, the rhombus, and the trapezium are tetragonal fingers.  [1913 Webster]
•  Having four prominent longitudinal angles.  [1913 Webster]
•  Designating, or belonging to, a certain system of crystallization; dimetric. See Tetragonal system, under Crystallization.  [1913 Webster]

OXFORD DICTIONARY

tetragonal, adj.
1 of or like a tetragon.
2 Crystallog. (of a crystal) having three axes at right angles, two of them equal.

Derivative

tetragonally adv.

ROGET THESAURUS

tetragonal

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.