plural of ecliptic plane

plural of equatorial plane

(astronomy) The plane that passes through the Earth's equator, or by extension the equators of other celestial bodies.

(astronomy) The ecliptic, the plane of the Earth's orbit around the Sun, or by extension the orbital planes of other celestial bodies.

plural of invariable plane

A mirror with a flat surface (i.e. the surface is a single plane)

An aircraft used for surveillance.

plural of spotter plane

plural of picture plane

plural of London plane