Electricity. a rotating member of a machine.
Compare stator (def 1).
Aeronautics. a system of rotating airfoils, as the horizontal ones of a helicopter or of the compressor of a jet engine.
any of a number of tall, cylindrical devices mounted on a special ship (rotor ship) and rotated in such a way that the Magnus effect of wind impinging on the cylinders is used to drive and maneuver the vessel.
(in a self-winding watch) a weight eccentrically mounted on an arbor for keeping the mainspring wound.
the rotating member of a machine or device, esp the armature of a motor or generator or the rotating assembly of a turbine Compare stator
a device having blades radiating from a central hub that is rotated to produce thrust to lift and propel a helicopter
the revolving arm of the distributor of an internal-combustion engine
a violent rolling wave of air occurring in the lee of a mountain or hill, in which the air rotates about a horizontal axis
noun 1. (physics) a quantum of vortex motion
[ruhf-voist] /ˈrʌfˈvɔɪst/ adjective 1. having a harsh or grating voice: a rough-voiced barker.
- Rough-winged swallow
[ruhf-wingd] /ˈrʌfˌwɪŋd/ noun 1. either of two New World swallows of the genus Stelgidopteryx, having outer primary feathers with small barblike hooks on the margins. 2. any of several African swallows of the genus Psalidoprocne, having similar feathers.
noun, plural (especially collectively) roughy (especially referring to two or more kinds or species) roughies. 1. a small marine fish, Arripis georgianus, of New Zealand and Australia. 2. any of several marine fishes having large, rough-edged scales, especially Trachichthys australis of Australia.