A planet that orbits the Sun beyond the orbit of the Earth and thus shows retrograde motion when viewed from the Earth

(nautical) A technique for navigation using planar geometry. / (nautical, proscribed) A technique for navigation using the assumption the Earth is flat.

(slang) guitarist; someone who plays the guitar

plural of plant room

plural of planetary system

The act or process of planarizing

(geology) The planar surface between adjacent strata

(anatomy) Any vertical plane that divides the body into anterior and posterior (belly and back) sections.

(anatomy) Any plane that divides the body into superior and inferior parts, roughly perpendicular to spine.

(anatomy) Any plane that divides the body into superior and inferior parts, roughly perpendicular to spine.