A swivel chair.

(aviation, chiefly US) a rotating location light installed at an airport, allowing the type of airport to be determined by the color and speed of the rotation.

plural of rotating beacon

The resultant magnetic field produced by coils symmetrically placed and supplied with polyphase electric current which is often used in electromechanical applications.

plural of Faraday rotation

(agriculture) A farming practice in which the same land is used to grow different crops in successive seasons or years (when once the land would have been left fallow); used to prevent erosion and increase fertility.

(physics) The rotation of the plane of polarization of plane polarized light as it passes through a chiral medium

plural of rotator cuff

A set of four smaller muscles in the shoulder responsible for rotating the humerus (upper arm bone).

A form of molding/moulding in which molten plastic is placed inside a rotating mold/mould.