precession

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precession

An MRI term for the relatively slow gyration of the axis of a spinning body, which traces out a conical configuration. Precision is caused by the application of a torque which tends to change the direction of the rotation axis and is continuously directed at right angles to the plane of the torque. The magnetic moment of a nucleus with spin will experience such a torque when inclined at an angle to the magnetic field, resulting in precession at the Larmor frequency.

pre·ces·sion

(prē-sesh'ŭn)
The secondary spin of magnetic movements around the main magnetic field.
References in periodicals archive ?
The precessing jet sweeps across more of the ambient matter in a given period of time, as compared to an otherwise same but nonprecessing jet (run2-scenario), with both jet examples considered to be moving through identical surroundings.
Then, we may use our solutions (with the proper rescaling) in a completely different physical context: for the description of spin precession in a coaxial (54) or a precessing magnetic field.
Modelling of drying in order to improve precessing quality of maize.
In Parallel and Distributed Precessing for Computational Mechanics.
Throughout the entire cabin shards of ice were aloft, bedazzled and precessing like slow comets.
They cover basic metallurgy, precessing, corrosion in boiling-water and pressurized-water reactors, deformation behavior, primary failure, and high temperature and transients.
Between the perfectly spinning toss and the flat toss lies a continuum of other possibilities, in which the coin spins around a tilted axis, precessing like an old-fashioned children's top.
Also, the gyro has a nasty habit of precessing, and can read incorrectly if not checked and caged frequently.
The precessing magnetic fields of so many trillions of nuclei rotating in lockstep creates a measurable RF signal emanating from the sample.