| Library / English Dictionary |
ROTATION
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
The act of rotating as if on an axis
Example:
the rotation of the dancer kept time with the music
Synonyms:
rotary motion; rotation
Classified under:
Nouns denoting acts or actions
Hypernyms ("rotation" is a kind of...):
motility; motion; move; movement (a change of position that does not entail a change of location)
Hyponyms (each of the following is a kind of "rotation"):
circumvolution (the act of turning or winding or folding around a central axis)
feather; feathering (turning an oar parallel to the water between pulls)
gyration; whirling (the act of rotating in a circle or spiral)
pivot (the act of turning on (or as if on) a pivot)
pronation (rotation of the hands and forearms so that the palms face downward)
spin; twirl; twist; twisting; whirl (the act of rotating rapidly)
spiral (flying downward in a helical path with a large radius)
supination (rotation of the hands and forearms so that the palms face upward)
turn; twist (turning or twisting around (in place))
twist; wind; winding (the act of winding or twisting)
turnout ((ballet) the outward rotation of a dancer's leg from the hip)
Derivation:
rotate (turn on or around an axis or a center)
rotate (cause to turn on an axis or center)
Sense 2
Meaning:
A planned recurrent sequence (of crops or personnel etc.)
Example:
the manager had only four starting pitchers in his rotation
Classified under:
Nouns denoting attributes of people and objects
Hypernyms ("rotation" is a kind of...):
chronological sequence; chronological succession; sequence; succession; successiveness (a following of one thing after another in time)
Derivation:
rotate (plant or grow in a fixed cyclic order of succession)
rotate (perform a job or duty on a rotating basis)
rotate (exchange on a regular basis)
Sense 3
Meaning:
A single complete turn (axial or orbital)
Example:
the revolution of the earth about the sun takes one year
Synonyms:
gyration; revolution; rotation
Classified under:
Hypernyms ("rotation" is a kind of...):
turn; turning (a movement in a new direction)
Hyponyms (each of the following is a kind of "rotation"):
clockwise rotation; dextrorotation (rotation to the right)
counterclockwise rotation; levorotation (rotation to the left)
axial motion; axial rotation; roll (rotary motion of an object around its own axis)
orbital motion; orbital rotation (motion of an object in an orbit around a fixed point)
spin (a swift whirling motion (usually of a missile))
Sense 4
Meaning:
(mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin
Classified under:
Nouns denoting relations between people or things or ideas
Hypernyms ("rotation" is a kind of...):
transformation ((mathematics) a function that changes the position or direction of the axes of a coordinate system)
Domain category:
math; mathematics; maths (a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement)
Context examples:
Its action involves the rotation of the arm and the flexing of the elbow.
(Biceps, NCI Thesaurus)
Because the arabinose sugar sterically hinders the rotation of the molecule within DNA, DNA replication ceases, specifically during the S phase of the cell cycle.
(Ancitabine, NCI Thesaurus)
A handle, usually attached to a shaft allowing manual rotation of the shaft.
(Knob Device Component, NCI Thesaurus)
Its action involves adduction, medial rotation, and extension of the arm.
(Musculus Latissimus Dorsi, NCI Thesaurus)
Another asteroid, 2008 HU4, will pass close enough to Earth in 2016 for interplanetary radar to determine some of its characteristics, such as size, shape and rotation.
(NASA announces latest progress in hunt for asteroids, NASA)
Along the way, this plasma somehow gets energized enough to strongly radiate light, forming two bright columns along the black hole’s axis of rotation.
(NuSTAR Probes Black Hole Jet Mystery, NASA)
Bennu's surface temperatures vary drastically over its 4.3-hour rotation period.
(NASA's OSIRIS-REx Explains Bennu Mystery Particles, NASA)
The sun completes a rotation about once a month — faster near its equator than near its poles.
(Curiosity Mars Rover Tracks Sunspots, NASA)
Astronomers will continue collect observations to further characterize the comet's physical properties (size, rotation, etc.) and also continue to better identify its trajectory.
(Newly Discovered Comet Is Likely Interstellar Visitor, NASA)
The rotation rate of 10:33:38 that the analysis yielded is several minutes faster than previous estimates in 1981, which were based on radio signals from NASA's Voyager spacecraft.
(Scientists Finally Know What Time It Is on Saturn, NASA)
