Word
rotor
Phoneticsro·tor
US/ˈɹoʊtɝ/
UK/ɹˈəʊtɐ/
Definitions
01mechanical part
n. the part of a machine that spins around to make it work.
n. the rotating part of a mechanical device, such as an electric motor, generator, or pump.
“The mechanic had to replace the rotor inside the car's alternator.”
“The engineer identified a hairline fracture in the main rotor, which explained the excessive vibration during high-speed operation.”
Technical
Usage
In electrical engineering, it is often contrasted with the 'stator', which is the stationary part of the machine.
Synonyms
Antonyms
02aviation
n. the large spinning blades on top of a helicopter that help it fly.
n. a system of rotating aerofoils, such as those on a helicopter, used to provide lift and control.
“The helicopter's rotor started spinning faster as it prepared for takeoff.”
“The pilot adjusted the pitch of the tail rotor to counteract the torque produced by the main blades.”
Technical
Teaching tip
While 'propeller' is used for planes, 'rotor' is the standard term for the lifting blades of a helicopter.
03mathematics
n. a mathematical value that has a size, a direction, and a specific location.
n. a quantity possessing magnitude, direction, and a specific line of action or position.
“The professor explained how to calculate the rotor in the physics problem.”
“The student struggled to differentiate between a simple vector and a rotor when mapping the forces across the rigid body.”
Technical · Academic
Synonyms
04weather
n. a strong, spinning wind that forms near mountains.
n. a powerful horizontal-axis atmospheric vortex created when strong winds interact with mountainous terrain.
“Pilots are warned to avoid the dangerous rotors that form behind the mountain peaks.”
“The glider was caught in a violent mountain rotor, forcing the pilot to perform an emergency maneuver to regain stability.”
Technical
Real-World Examples
“Aviation safety expert Jeff Guzzetti said the alarm suggested a potential loss of engine power and a dangerous decrease in the main rotor speed.” “That means the tips of the rotors on SkyFall will slice through Martian air at supersonic speed.” Etymology
From an irregular clipping of rotator, originally in mathematics, coined by English mathematician and philosopher William Kingdon Clifford based on vector, see quotations. Doublet of rota and ruote.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
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Scan code
englishreference.com/q/rotor