plane
flat, infinite two-dimensional surface
origin plane
plane containing the origin
invariable plane
plane passing through the barycenter of a planetary system, perpendicular to its angular momentum vector
hyperbolic plane
quadratic space with a form x^2-y^2
Laplace plane
reference plane about whose axis the instantaneous orbital plane of a satellite precesses
osculating plane
plane in a Euclidean space or affine space which meets a submanifold at a point in such a way as to have a second order of contact at the point
normal plane
any plane containing the normal vector of a surface at a particular point
complex plane
geometric representation of the complex numbers
complex plane
geometric representation of the complex numbers
tangent plane
best approximation of a surface by a plane at a given point
secant plane
plane containing a nontrivial section of a sphere or an ellipsoid
projection plane
plane surface used in generating a graphical projection of a three-dimensional object