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rotation

rotation

54 2.8
Turning around a central point, for example the Earth spinning once
  • noun
  • /roʊˈteɪʃən/
translation icon : rotación
  • The rotation of the Earth causes day and night as it spins on its axis.
  • Earth's rotation
  • rotation period
  • axis of rotation

You come up backwards, three full somersault rotations and then come back down forward.

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Examples

  • The Moon slowed the rotation of the Earth, finally giving the thirty-six hour day.

    Fiction book (2000)
  • How can you force the rotation of an entire planet?

  • Because of the Earth's rotation.

  • Angular momentum is the measure of the rotation of an object about an axis.

    Academic text (1992)
  • Due to earth's rotation, we're in line with Vega only hours a day.

  • As early as 1939, Milton Humason had studied the rotation of the main part of the galaxy.

    Academic text (1993)
  • Astronomers study the rotation of planets to understand their atmospheres and climates.

  • Due to the rotation of the Earth, different parts of the world experience varying seasons.

Synonyms

turn
vsrotation
485 1.0

A change of direction in a road or path

refers to the ongoing process rather than a single brief change of direction
spin
vsrotation
104 1.1

A quick turning movement of an object or person

is the general process and does not insist on rapid speed
revolution
vsrotation
  • Specialized
45 3.5

One complete turn around a central point, like a planet or wheel

is the ongoing process rather than a single complete circuit
turning
vsrotation
22 2.5

A change of direction in a road or path

is more specific about movement around an axis rather than general position changes
pivot
vsrotation
4 4.0

A turn of the body made by keeping one foot in place

focuses on a single fixed point rather than the general ongoing process
twisting
vsrotation
1 2.4

Turning something around quickly so it spins

is the neutral process and does not require speed or force
rotary motion
vsrotation
  • Specialized
3.6

Movement in which something spins around a fixed line

is the general single word name for the same circular movement
gyration
vsrotation
8.0

One complete turn, like a wheel or a dancer

is the ongoing process instead of one isolated circuit
circumvolution
vsrotation
  • Specialized
9.9

A twist or coil around a middle point, like a spiral staircase

focuses on winding or folding rather than simple circular movement around an axis

Compounds

axis of rotation
  • Specialized
1 4.3

A straight line that an object turns around

A movement that turns in the same direction as the hands of a clock

A movement that turns to the left, the opposite direction of a clock's hands

axial rotation
  • Specialized
6.5

Turning of an object around a line through its middle

orbital rotation
  • Specialized
7.0

An object moving in a curved path around another object, not spinning on itself

How Fast

whirl
12 3.7
spin
104 1.1
rotation
54 2.8
turn
485 1.0
stillness
38 3.5

Surface Forms

rotation singular
rotations plural

Morphology

rotation = rotate (transparent) = rotate + ion

The noun is a regular -ion nominalization of the verb 'rotate', denoting the act or process of turning; this is straightforward for learners.

Etymology

Rotation comes from the Latin root rotare, from rota meaning 'wheel', and originally meant 'to turn'. Picture the Earth as a wheel turning around its center, and you can see why a rotation is a full turn.