rotor

rotor

See also: Rotor and rötor

English

Etymology

From an irregular shortening of rotator.

Pronunciation

• (UK) IPA^(key): /ˈɹəʊ.tə/

• Audio (UK)

  (file)

• (US) IPA^(key): /ˈɹoʊ.ɾɚ/
• (US, non-rhotic) IPA^(key): /ˈɹoʊ.ɾə/
• Rhymes: (UK) -əʊtə
• Homophones: rota, Rota (non-rhotic accents), Rhoda (non-rhotic accents with flapping)

Noun

rotor (plural rotors)

1. A rotating part of a mechanical device; for example, in an electric motor, generator, alternator, or pump.
   • 2013 July-August, Lee S. Langston, “The Adaptable Gas Turbine”, in American Scientist:

     Turbines have been around for a long time—windmills and water wheels are early examples. The name comes from the Latin turbo, meaning vortex, and thus the defining property of a turbine is that a fluid or gas turns the blades of a rotor, which is attached to a shaft that can perform useful work.

2. (aviation) The wing of a helicopter or other rotary-wing aircraft.
3. (meteorology) A type of powerful horizontal-axis atmospheric vortex generated by the interaction of strong winds with mountainous terrain.
   • 2001, National Transportation Safety Board, “1.7.1 Observations and Forecasts”, in Uncontrolled Descent and Collision With Terrain, United Airlines Flight 585, Boeing 737-200, N999UA, 4 Miles South of Colorado Springs Municipal Airport, Colorado Springs, Colorado, March 3, 1991‎, archived from the original on 22 January 2021, retrieved 29 January 2021, page 30-31:

     A glider instructor, who had been in the COS area for more than 25 years, was interviewed. He stated that around 1200 on the day of the accident, he observed a rotor hit the ground with estimated wind speeds of 70 to 80 miles per hour.

4. A quantity having magnitude, direction, and position.

Hyponyms

• main rotor
• tail rotor
• wound rotor

Derived terms

• mountain rotor
• rotor burst
• rotor brake
• rotor cloud
• rotor machine
• rotor kite
• rotor sail

Related terms

• stator

Translations

a rotating part of a mechanical device

Arabic: عَمُود نَاقِل الْحَرَكَة‎ m (ʿamūd nāqil al-ḥaraka) Basque: errotore (eu) Bulgarian: ротор m (rotor) Chinese: Mandarin: 轉子／转子 (zh) (zhuànzǐ) Czech: rotor (cs) m Finnish: roottori (fi), pyörijä French: rotor (fr) m German: Rotor (de) m Greek: δρομέας (el) m (droméas) Italian: rotore (it) m Japanese: ローター (rōtā), 回転子 (かいてんし, kaitenshi) Macedonian: ротор m (rotor) Maori: paetāwhirowhiro Norwegian: rotor m Polish: wirnik (pl) m, rotor (pl) m Portuguese: rotor m Romanian: rotor (ro) n Russian: ро́тор (ru) m (rótor) Serbo-Croatian: Cyrillic: ротор m Roman: rotor (sh) m Spanish: rotor (es) m Tagalog: painog Ukrainian: ро́тор (uk) m (rótor)

the wing of a helicopter or similar

Bulgarian: ротор m (rotor), перка (bg) f (perka) Chinese: Mandarin: 旋翼 (zh) (xuányì), 主旋翼 (zhǔ xuányì) Finnish: roottori (fi) German: Hauptrotor m Italian: rotore (it) m, pala (it) f Polish: wirnik (pl) m, śmigło (pl) n Portuguese: hélice (pt) f Romanian: elice (ro) f Russian: ро́тор (ru) m (rótor), несу́щий винт m (nesúščij vint)

---

Czech

Etymology

From English rotor, ultimately from Latin rota.

Pronunciation

• IPA^(key): [ˈrotor]
• Rhymes: -otor

Noun

rotor m

1. rotor (rotating part of a mechanical device)

Related terms

• rotace
• rotačka
• rotoped
• rotovat
• rotunda
• runda

 

Further reading

• rotor in Příruční slovník jazyka českého, 1935–1957
• rotor in Slovník spisovného jazyka českého, 1960–1971, 1989
• rotor in Internetová jazyková příručka

---

Dutch

Etymology

Borrowed from Latin rotor.

Pronunciation

• IPA^(key): /ˈroː.tɔr/, /ˈroː.tər/

• Audio

  (file)

• Hyphenation: ro‧tor
• Rhymes: -oːtɔr, -oːtər

Noun

rotor m (plural rotoren or rotors, diminutive rotortje n)

1. rotor

Derived terms

• rotoras
• rotorblad

---

French

Noun

rotor m (plural rotors)

1. rotor

Further reading

• “rotor”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

---

Latin

Verb

rotor

1. first-person singular present passive indicative of rotō

References

• rotor in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)

---

Polish

Etymology

Borrowed from English rotor.

Pronunciation

• IPA^(key): /ˈrɔ.tɔr/

• Audio

  (file)

• Rhymes: -ɔtɔr
• Syllabification: ro‧tor

Noun

rotor m inan

1. rotor (rotating part of a mechanical device)

   Synonym: wirnik

2. rotor (propeller on a rotorcraft that provides lift)

   Synonym: wirnik

3. (meteorology) rotor (type of powerful horizontal-axis atmospheric vortex generated by the interaction of strong winds with mountainous terrain)

Declension

Declension of rotor

	singular	plural
nominative	rotor	rotory
genitive	rotora	rotorów
dative	rotorowi	rotorom
accusative	rotor	rotory
instrumental	rotorem	rotorami
locative	rotorze	rotorach
vocative	rotorze	rotory

Derived terms

adjective

• rotorowy

 

Further reading

• rotor in Wielki słownik języka polskiego, Instytut Języka Polskiego PAN
• rotor in Polish dictionaries at PWN

---

Portuguese

Noun

rotor m (plural rotores)

1. rotor (a rotating part of a mechanical device)
2. rotor (central part of a helicopter’s wings)

---

Romanian

Etymology

From French rotor.

Noun

rotor n (plural rotoare)

1. rotor

Declension

Declension of rotor

	singular		plural
	indefinite articulation	definite articulation	indefinite articulation	definite articulation
nominative/accusative	(un) rotor	rotorul	(niște) rotoare	rotoarele
genitive/dative	(unui) rotor	rotorului	(unor) rotoare	rotoarelor
vocative	rotorule		rotoarelor

---

Serbo-Croatian

Pronunciation

• IPA^(key): /rôːtor/
• Hyphenation: ro‧tor

Noun

rȏtor m (Cyrillic spelling ро̑тор)

1. rotor

Declension

Declension of rotor

	singular	plural
nominative	rotor	rotori
genitive	rotora	rotora
dative	rotoru	rotorima
accusative	rotor	rotore
vocative	rotoru / rotore	rotori
locative	rotoru	rotorima
instrumental	rotorom	rotorima

---

Spanish

Pronunciation

• IPA^(key): /roˈtoɾ/ [roˈt̪oɾ]
• Rhymes: -oɾ
• Syllabification: ro‧tor

Noun

rotor m (plural rotores)

1. rotor

Further reading

• “rotor”, in Diccionario de la lengua española, Vigésima tercera edición, Real Academia Española, 2014

---

Turkish

Noun

rotor (definite accusative rotoru, plural rotorlar)

1. (aviation) rotor

Declension

Inflection
Nominative	rotor
Definite accusative	rotoru
	Singular	Plural
Nominative	rotor	rotorlar
Definite accusative	rotoru	rotorları
Dative	rotora	rotorlara
Locative	rotorda	rotorlarda
Ablative	rotordan	rotorlardan
Genitive	rotorun	rotorların
Possessive forms Nominative Singular Plural 1st singular rotorum rotorlarım 2nd singular rotorun rotorların 3rd singular rotoru rotorları 1st plural rotorumuz rotorlarımız 2nd plural rotorunuz rotorlarınız 3rd plural rotorları rotorları Definite accusative Singular Plural 1st singular rotorumu rotorlarımı 2nd singular rotorunu rotorlarını 3rd singular rotorunu rotorlarını 1st plural rotorumuzu rotorlarımızı 2nd plural rotorunuzu rotorlarınızı 3rd plural rotorlarını rotorlarını Dative Singular Plural 1st singular rotoruma rotorlarıma 2nd singular rotoruna rotorlarına 3rd singular rotoruna rotorlarına 1st plural rotorumuza rotorlarımıza 2nd plural rotorunuza rotorlarınıza 3rd plural rotorlarına rotorlarına Locative Singular Plural 1st singular rotorumda rotorlarımda 2nd singular rotorunda rotorlarında 3rd singular rotorunda rotorlarında 1st plural rotorumuzda rotorlarımızda 2nd plural rotorunuzda rotorlarınızda 3rd plural rotorlarında rotorlarında Ablative Singular Plural 1st singular rotorumdan rotorlarımdan 2nd singular rotorundan rotorlarından 3rd singular rotorundan rotorlarından 1st plural rotorumuzdan rotorlarımızdan 2nd plural rotorunuzdan rotorlarınızdan 3rd plural rotorlarından rotorlarından Genitive Singular Plural 1st singular rotorumun rotorlarımın 2nd singular rotorunun rotorlarının 3rd singular rotorunun rotorlarının 1st plural rotorumuzun rotorlarımızın 2nd plural rotorunuzun rotorlarınızın 3rd plural rotorlarının rotorlarının