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nutation

XDict

n. 垂头,下垂,俯下,章动

PyDict

垂头,下垂,俯下,章动

WordNet (r) 3.0 (2006) (WordNet)

nutation
n 1: uncontrolled nodding

The Collaborative International Dictionary of English v.0.48 (gcide)

Nutation \Nu*ta"tion\, n. [L. nutatio a nodding, fr. nutare to
nod: cf. F. nutation.]
1. The act of nodding.
[1913 Webster]

So from the midmost the nutation spreads,
Round and more round, o'er all the sea of heads.
--Pope.
[1913 Webster]

2. (Astron.) A very small libratory motion of the earth's
axis, by which its inclination to the plane of the
ecliptic is constantly varying by a small amount.
[1913 Webster]

3. (Bot.)
(a) The motion of a flower in following the apparent
movement of the sun, from the east in the morning to
the west in the evening.
(b) Circumnutation.
[1913 Webster]

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英文字典中文字典相关资料:

Nutation - Wikipedia
Nutation (from Latin nūtātiō 'nodding, swaying') is a rocking, swaying, or nodding motion in the axis of rotation of a largely axially symmetric object, such as a gyroscope, planet, or bullet in flight, or as an intended behaviour of a mechanism
Nutation | Definition, Causes, Period, Facts | Britannica
Nutation, in astronomy, a small irregularity in the precession of the equinoxes Precession is the slow, toplike wobbling of the spinning Earth, with a period of about 25,772 years
What Is Nutation? Definition, Causes, and Types - ScienceInsights
Nutation is a small, rhythmic wobble in the axis of a spinning object You’ll encounter the term most often in astronomy, where it describes a slight nodding motion of Earth’s rotational axis, but it also applies to gyroscopes, spinning tops, and even growing plants
6. 8: Nutation - Physics LibreTexts
Those who have studied the gyrations of a spinning top will recall that, in addition to precessing, a top may nutate, or nod up and down (Latin nutare, to nod), the amplitude and type of nutation depending on the initial conditions Earth’s axis does indeed nutate, but not from the same cause
What Is Nutation? A Simple Definition and Explanation
Nutation is best described as a nodding or swaying motion of a spinning object’s axis of rotation When a body spins, its rotational axis does not always point in a fixed direction; instead, it undergoes a small, periodic oscillation
What Is Nutation? The Science of Earth’s Wobble
Nutation describes an oscillating or nodding motion in the axis of rotation of a spinning object It represents a small, periodic oscillation superimposed upon a larger, more stable rotational movement
Nutation - NASA
Nutation is the short-period oscillations in the motion of the pole of rotation of a freely rotating body that is undergoing torque from external gravitational forces
What is nutation? - blog. truegeometry. com
Nutation is a much smaller, faster oscillation on top of that precession Causes: The primary cause of Earth's nutation is the gravitational pull of the Sun and Moon on Earth's equatorial bulge
What Is Nutation? - AllTheScience
Nutation is a word derived from the Latin nutare meaning to nod It means a nodding, swaying, or rocking motion in an axis of rotation The rotation may be of a symmetrical object, such as a bullet in flight or a gyroscope
NUTATION Definition Meaning - Merriam-Webster
More from Merriam-Webster on nutation Britannica com: Encyclopedia article about nutation Love words? Need even more definitions? Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Merriam-Webster unabridged

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