from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A disturbance or fluctuation in the earth's magnetic field, associated with solar flares. Also called geomagnetic storm.
from the GNU version of the Collaborative International Dictionary of English
- adj. a disturbance of the earth's magnetic force characterized by great and sudden changes.
- n. A sudden disturbance of the earth's magnetic field; caused by emission of particles from the sun.
- n. See under Magnetic.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a sudden disturbance of the earth's magnetic field; caused by emission of particles from the sun
Sorry, no etymologies found.