An Etymological Dictionary of Astronomy and Astrophysics

A rotating part of an electrical apparatus, e.g. the armature of a generator, or of a mechanical device.

A system of several flat blades attached to a hub, which rotates either horizontally to give lift and thrust to a helicopter, or vertically to help control it.
Meteo.: The circulation of flow about a horizontal or nearly horizontal axis.

Etymology (EN): Short for rotator, → rotate, + → -or.

Etymology (PE): Carxâ agent noun of carxidan, → rotate.