precession

[ pree-sesh-uhn ]

/ priˈsɛʃ ən /

SEE SYNONYMS FOR precession ON THESAURUS.COM

noun

the act or fact of preceding; precedence.

Mechanics. the motion of the rotation axis of a rigid body, as a spinning top, when a disturbing torque is applied while the body is rotating such that the rotation axis describes a cone, with the vertical through the vertex of the body as axis of the cone, and the motion of the rotating body is perpendicular to the direction of the torque.

Astronomy.

the slow, conical motion of the earth's axis of rotation, caused by the gravitational attraction of the sun and moon, and, to a smaller extent, of the planets, on the equatorial bulge of the earth.
precession of the equinoxes.

Origin of precession

1300–50; <Late Latin praecessiōn- (stem of praecessiō) a going before, advance, equivalent to Latin praecess(us) (past participle of praecēdere to precede) + -iōn--ion; see cession

OTHER WORDS FROM precession

pre·ces·sion·al, adjective

Words nearby precession

preceptorship, preceptory, preceptress, preceramic, precess, precession, precession of the equinoxes, pre-Christian, pre-Christmas, précieuse, précieux

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for precession

In all our examples the slower the spin the quicker is the precession produced by given tilting forces.
Spinning Tops|John Perry
How far away from Polaris will the precession carry the pole?
A Text-Book of Astronomy|George C. Comstock
Upon the precession of the equinoxes they erect a fabric of retrograde chronology, and set a clock to geologic time.
Lippincott's Magazine of Popular Literature and Science, Vol. 17, No. 97, January, 1876|Various
This variety of opinions proceeded from the precession of the Equinox, then not known to the Greeks.
The Chronology of Ancient Kingdoms Amended|Isaac Newton

The precession controls, though operational, had not to date been required.
Where I Wasn't Going|Walt Richmond

British Dictionary definitions for precession

precession

/ (prɪˈsɛʃən) /

noun

the act of preceding

See precession of the equinoxes

the motion of a spinning body, such as a top, gyroscope, or planet, in which it wobbles so that the axis of rotation sweeps out a cone

Derived forms of precession

precessional, adjectiveprecessionally, adverb

Word Origin for precession

C16: from Late Latin praecessiō a going in advance, from Latin praecēdere to precede

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for precession

precession

[ prē-sĕsh′ən ]

The rotational motion of the axis of a spinning body, such as the wobbling of a spinning top, caused by torque applied to the body along its axis of rotation.

The motion of this kind made by the Earth's axis, caused mainly by the gravitational pull of the Sun, Moon, and other planets. The precession of Earth's axis has a period of nearly 25,800 years, during which time the reference points on the equatorial coordinate system (the celestial poles and celestial equator) will gradually shift their positions on the celestial sphere.♦ The precession of the equinoxes is the slow westward shift of the autumnal and vernal equinoxes along the ecliptic, resulting from precession of the Earth's axis. See also nutation.

单词	precession
释义	precession [ pree-sesh-uhn ] / priˈsɛʃ ən / SEE SYNONYMS FOR precession ON THESAURUS.COM noun the act or fact of preceding; precedence. Mechanics. the motion of the rotation axis of a rigid body, as a spinning top, when a disturbing torque is applied while the body is rotating such that the rotation axis describes a cone, with the vertical through the vertex of the body as axis of the cone, and the motion of the rotating body is perpendicular to the direction of the torque. Astronomy. the slow, conical motion of the earth's axis of rotation, caused by the gravitational attraction of the sun and moon, and, to a smaller extent, of the planets, on the equatorial bulge of the earth. precession of the equinoxes. Origin of precession 1300–50; <Late Latin praecessiōn- (stem of praecessiō) a going before, advance, equivalent to Latin praecess(us) (past participle of praecēdere to precede) + -iōn--ion; see cession OTHER WORDS FROM precession pre·ces·sion·al, adjective Words nearby precession preceptorship, preceptory, preceptress, preceramic, precess, precession, precession of the equinoxes, pre-Christian, pre-Christmas, précieuse, précieux Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for precession In all our examples the slower the spin the quicker is the precession produced by given tilting forces. Spinning Tops\|John Perry How far away from Polaris will the precession carry the pole? A Text-Book of Astronomy\|George C. Comstock Upon the precession of the equinoxes they erect a fabric of retrograde chronology, and set a clock to geologic time. Lippincott's Magazine of Popular Literature and Science, Vol. 17, No. 97, January, 1876\|Various This variety of opinions proceeded from the precession of the Equinox, then not known to the Greeks. The Chronology of Ancient Kingdoms Amended\|Isaac Newton The precession controls, though operational, had not to date been required. Where I Wasn't Going\|Walt Richmond British Dictionary definitions for precession precession / (prɪˈsɛʃən) / noun the act of preceding See precession of the equinoxes the motion of a spinning body, such as a top, gyroscope, or planet, in which it wobbles so that the axis of rotation sweeps out a cone Derived forms of precession precessional, adjectiveprecessionally, adverb Word Origin for precession C16: from Late Latin praecessiō a going in advance, from Latin praecēdere to precede Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Words related to precession supremacy, lead, preeminence, primary, rank, priority, superiority, preference, seniority, antecedence, precedency, preexistence, earliness, anteposition, prevenience, previousness, right of way Scientific definitions for precession precession [ prē-sĕsh′ən ] The rotational motion of the axis of a spinning body, such as the wobbling of a spinning top, caused by torque applied to the body along its axis of rotation. The motion of this kind made by the Earth's axis, caused mainly by the gravitational pull of the Sun, Moon, and other planets. The precession of Earth's axis has a period of nearly 25,800 years, during which time the reference points on the equatorial coordinate system (the celestial poles and celestial equator) will gradually shift their positions on the celestial sphere.♦ The precession of the equinoxes is the slow westward shift of the autumnal and vernal equinoxes along the ecliptic, resulting from precession of the Earth's axis. See also nutation. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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precession

noun

Origin of precession

OTHER WORDS FROM precession

Words nearby precession

Example sentences from the Web for precession

British Dictionary definitions for precession

noun

Derived forms of precession

Word Origin for precession

Words related to precession

Scientific definitions for precession