#95. Four. -- N. quaternity[obs3], four, tetrad, quartet, quaternion, square, quarter.
[planar form with four sides] tetract[obs3], tetragon, quadrangle, rectangle.
[three dimensional object with four surfaces] tetrahedron.
quadrature, quadrifoil, quadriform, quadruplet; quatrefoil.
[object or animal with four legs] tetrapod.
[geographical area with four sides] quadrangle, quad[coll.].
[electromagnetic object] quadrupole.
[four fundamental studies] quadrivium.
V. reduce to a square, square.
Adj. four; quaternary, quaternal[obs3]; quadratic; quartile; tetract[obs3], tetractic[obs3], tetractinal[obs3]; tetrad, tetragonal; square, quadrate.