(anatomy) the plane which divides the body of an animal into similar right and left halves

An airplane that supposedly could detect oil fields underground.

(mechanics) One of the simple machines; a sloping surface such as a ramp such that an object can be raised with less effort than being lifted vertically.

In art, the imaginary plane correspondent with the physical surface of a drawing, painting or print.

a hand plane designed for cutting rebates in wood

(geometry) The set of all points in a planar coordinate system.

A rebate plane.

(mathematics) the locus of points in the Euclidean plane that satisfies some geometric or algebraic definition; a curve in a plane (as opposed to higher-dimensional space)

(mathematics) Two-dimensional Euclidean space.

(mathematics) a representation of the space of complex numbers