follow Dictionary.com

Get the details behind our redesign

rotor

[roh-ter] /ˈroʊ tər/
noun
1.
Electricity. a rotating member of a machine.
Compare stator (def 1).
2.
Aeronautics. a system of rotating airfoils, as the horizontal ones of a helicopter or of the compressor of a jet engine.
3.
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.
4.
(in a self-winding watch) a weight eccentrically mounted on an arbor for keeping the mainspring wound.
Origin
1873
1873; short for rotator
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for rotor ship

rotor

/ˈrəʊtə/
noun
1.
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
2.
a device having blades radiating from a central hub that is rotated to produce thrust to lift and propel a helicopter
3.
the revolving arm of the distributor of an internal-combustion engine
4.
a violent rolling wave of air occurring in the lee of a mountain or hill, in which the air rotates about a horizontal axis
Word Origin
C20: shortened form of rotator
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for rotor ship
rotor
1873, irregular shortening of rotator, originally in mathematics. Mechanical sense is attested from 1903; specifically of helicopters from 1930. Rototiller (with tiller) is a proprietary name in U.S., attested from 1923.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source

Word of The Day

Difficulty index for rotor

Most English speakers likely know this word

Word Value for rotor

5
5
Scrabble Words With Friends