Chiefly Mathematics. Inversely correspondent or complementary; esp. (a) (of a function, expression, etc.) so related to another that their product is…

Geometry. Of a polygon: having all its sides equal and all its angles equal. Of a solid figure: bounded by identical faces that are regular polygons.

Mathematics. Of, relating to, or produced by the projection of lines or figures on a surface. Now rare.

semi-conjugate axis, semi diameter = conjugate semiaxis, semidiameter: see conjugate, adj. 6a there, and quot. 1885 at semidiameter, n. a. Also ellip…

Geometry. Having the same anharmonic ratio or system of anharmonic ratios, as two figures of the same thing in different perspective; belonging…

= symmetrical, adj.

Having the same focus or foci.

Geometry. Said of propositions, figures, etc. reciprocally related so that to a point in either corresponds (in solid geometry) a plane, or (in…

Of or pertaining to geometrical involution; connecting a system of objects in pairs.

Of a pair of arcs or angles: totalling 360°. Of two elements of a matrix: differing in position by having row and column numbers interchanged.

The reverse or opposite of symmetrical, adj. in various senses (see quots.).

Usually homeo-. Mathematics. Related by a homoeomorphism, topologically equivalent to a complex, figure, or topological space; that is a…

Mathematics. Related by a homotopy to another complex or path, or the mapping of which it is an image; that is a homotopy.

Mathematics. That is an isometry; related by an isometry. Const. to.