from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A condition found in the region around a magnet or an electric current, characterized by the existence of a detectable magnetic force at every point in the region and by the existence of magnetic poles.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a condition in the space around a magnet or electric current in which there is a detectable magnetic force and two magnetic poles are present
from the GNU version of the Collaborative International Dictionary of English
- n. See Magnetic.
- n. The space around a magnet through which it exerts magnetic force; a field of force surrounding a permanent magnet, electrical current, or a moving charged particle; called also magnetic flux and field of magnetic force.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the lines of force surrounding a permanent magnet or a moving charged particle
Sorry, no etymologies found.
The particle-beam could shut down a fusion drive for a couple of seconds by collapsing the magnetic field that squeezed the fuel together.
Two minutes later the submarine’s magnetic field activated the needles on shore.
One of Wizard’s raremilitary inventions, the Warblers created a magnetic field that disrupted the flight of high-subsonic metal objects—specifically bullets—creating a gunfire-free zone.
In addition, Hoxa Sound, which he had been told was unguarded, was defended by hydrophones, which picked up the sound of approaching ships; by seabed cables, which caused a galvanometer needle to flick when an electric current was induced by the magnetic field of a crossing vessel; and by mines, which could be detonated electrically from the shore.
Hoxa Sound, which the submarine’s captain intended to enter, was defended by hydrophones that picked up the sound of all approaching ships, by seabed cables that caused the needle of a galvanometer to flick when an electric current was induced by the magnetic field of any crossing vessel, and by mines that could be detonated electrically from the shore.
It happens that, at irregular intervals of tens or hundreds of thousands of years, the Earth’s magnetic field completely reverses, presumably because of major shifts in the molten nickel/ iron core.
Unlike regular MRIs, which use a powerful magnetic field to get images of your insides, fMRIs measure blood flow in the brain in an effort to determine which areas are activated by specific thoughts, reactions, or emotions.
Power flowing through the circuitry of the main ansible created, as power does, a magnetic field and though the ansible’s automatic signal of availability did not come on, that magnetic field attracted a small, unimportant magnet on the ansible platform’s outer surface, making another connection, this one visual, completing a pattern that before had seemed to have a gap, a missing paint chip.