precessional


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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.
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I thought of the great precessional cycle that the pole of the earth describes.
From the perspective of the precessing magnetic moments, the biomagnetic field generated by neuronal activity also contributes to the applied magnetic field, thereby altering their precessional frequencies.
This December 21st, 2012 date is also significant globally as it marks not only this year's Winter Equinox but also the Precessional Earth Equinox, which many believe is the alignment of planet Earth with the very center of the Milky Way galaxy.
The best studied is 56 Ari [10] whose magnetic axis has a precessional period of 5 years.
31) MRI is able to measure liver fat based on the slightly different precessional frequencies of fat and water protons in a magnetic field.