Word Study
orthogonal
CIDE DICTIONARY
orthogonal, a. [Cf. F. orthogonal.].
Right-angled; rectangular; as, an orthogonal intersection of one curve with another. [1913 Webster]
OXFORD DICTIONARY
orthogonal, adj. of or involving right angles.
Etymology
F f. orthogone (as ORTHO-, -GON)
THESAURUS
orthogonal
cube-shaped, cubed, cubic, cubiform, cuboid, diced, foursquare, normal, oblong, orthodiagonal, orthometric, perpendicular, plumb, plunging, precipitous, quadrangular, quadrate, quadriform, quadrilateral, rectangular, rhombic, rhomboid, right-angle, right-angled, right-angular, sheer, square, steep, straight-up, straight-up-and-down, tetragonal, tetrahedral, trapezohedral, trapezoid, up-and-downROGET THESAURUS
orthogonal
Verticality
N verticality, erectness, perpendicularity, right angle, normal, azimuth circle, wall, precipice, cliff, elevation, erection, square, plumb line, plummet, vertical, upright, erect, perpendicular, plumb, normal, straight, bolt, upright, rampant, standing up, rectangular, orthogonal, vertically, up, on end, up on end, right on end, a plomb, endwise, one one's legs, at right angles.Perpendicularity
N perpendicularity, orthogonality, verticality, orthogonal, perpendicular, rectangular, uncorrelated.For further exploring for "orthogonal" in Webster Dictionary Online