Platanus orientalis, a deciduous tree known for its longevity and spreading crown.

A plane (the tool, not the vehicle) used for working the upper surface of staircase rails. They are relatively rounded

(optics) Any plane perpendicular to the axis of a lens or mirror. / (optics) Such a plane, in a camera, microscope etc, in which the real image is in focus.

A plane used for final flattening out of wooden surfaces.

(geometry) A plane in which any pair of distinct points determine a line and any pair of distinct lines intersect at a point.

A jet: an airplane that is powered by a jet engine.

Alternative form of planetree / (mathematics) An ordered tree, a type of graph, in which the child nodes of each vertex have a definite number assigned.

(anatomy) The anatomical position of the human skull, based on a plane passing through the inferior margin of the left orbit and the upper margin of each ear canal or external auditory meatus.

A two-dimensional plane (or other surface) of weakness along which a crystal or other solid will break when under stress.

(mathematics, engineering) The complex plane on which Laplace transforms are graphed; a mathematical domain where processes are viewed in the frequency domain rather than the time domain; used as a graphical analysis tool in engineering and physics.