precession

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Related to Free precession: precessional, Torque-free precession

precession

the act of preceding; precedence; the slow, conical motion of the earth’s axis of rotation
Not to be confused with:
procession – a line of people, animals, vehicles, etc., moving along in orderly succession

pre·ces·sion

 (prē-sĕsh′ən)
n.
1. The act or state of preceding; precedence.
2. Physics The motion of the axis of a spinning body, such as the wobble of a spinning top, when there is an external force acting on the axis.
3. Astronomy
a. Precession of the equinoxes.
b. A slow gyration of the earth's rotational axis around the pole of the ecliptic, caused by the gravitational pull of the sun, moon, and other planets on the earth's equatorial bulge.

[Late Latin praecessiō, praecessiōn-, from Latin praecessus, past participle of praecēdere, to go before; see precede.]

pre·ces′sion·al adj.

precession

(prɪˈsɛʃən)
n
1. the act of preceding
2. (Astronomy) See precession of the equinoxes
3. (General Physics) 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
[C16: from Late Latin praecessiō a going in advance, from Latin praecēdere to precede]
preˈcessional adj
preˈcessionally adv

pre•ces•sion

(priˈsɛʃ ən)

n.
1. the act or fact of preceding; precedence.
2. the movement of the axis of rotation of a spinning body around another axis, outside the body and at an angle to it: an effect exhibited by a spinning top or gyroscope.
3. the slow, conical motion of the earth's axis of rotation caused by forces exerted on the earth by the sun and moon and responsible for the precession of the equinoxes.
[1300–50; < Late Latin praecessiō a going before, advance, derivative (with -tiō -tion) of praecēdere to precede]
pre•ces′sion•al, adj.

pre·ces·sion

(prē-sĕsh′ən)
1. The motion of the axis of a spinning body, such as the wobbling of a spinning top, that arises when an external force acts on the axis.
2. 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 the equinoxes is the slow westward shift of the autumnal and vernal equinoxes along the ecliptic, resulting from precession of the Earth's axis. A complete precession of the equinoxes takes 25,800 years.

precession

ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.precession - the motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out a cone
motion - a state of change; "they were in a state of steady motion"
2.precession - the act of preceding in time or order or rank (as in a ceremony)
activity - any specific behavior; "they avoided all recreational activity"
Translations
precessie

precession

nPräzession f; precession of the equinoxes (Astron) → Präzession fder Äquinoktien
References in periodicals archive ?
Steady state free precession images (SSFP) showed severe generalized global hypokinesia of the left ventricle (Ejection Fraction 17%).
T2-weighed MRI sequences and high-resolution fast imaging employing thin section steady-state free precession MR images can be used to display possible vascular compressions, as demonstrated in this case.
Commonly used are 3D SSFP (Steady State Free Precession) sequence and FSE (Fast Spin Echo) sequences like HASTE (Half-Fourier Acquisition Single-Shot Turbo Spin Echo) and RARE (Rapid Acquisition with Rapid Enhancement sequence).
Caption: Figure 2: Cardiac magnetic resonance imaging 4-chamber view (still frame from a steady-state free precession (SSFP) cine sequence) with the left ventricular apical mass taken shortly after presentation.
The standard protocol included multiplane steady-state free precession (SSFP) localizers, transversal T1-TSE black blood, sequences cine steady-state free precession (SSFP) oriented 2, 3, 4 chamber and short axis for the study of the kinetics of the right and left ventricles, T2 short-tau inversion recovery (STIR) black blood for the study of myocardial oedema in short axis and 4 chamber, dynamic sequence T1-TFE in short axis, Phase-contrast to study valvular flow, Phase Sensitive Inversion Recovery (PSIR) sequences for the study of late gadolinium enhancement (LGE) performed after 10-15 minutes after intravenous administration of gadolinium (0.1mmol/kg).
This is the most basic behavior of a torque-free rigid body with axial symmetry, and is called "free precession".
Normal serous pericardial fluid will demonstrate high signal intensity on cine steady state free precession (SSFP) sequences.