Pronunciation: ( jī'rō-frē"kwun-sē), [key]
—pl. -cies. Physics.
the frequency of rotation of an electron or other charged particle in a magnetic field, directly proportional to the charge of the particle and to the field strength and inversely proportional to the mass of the particle.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.