magnetic field

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field

 [fēld]
1. an area or open space, as an operative field or visual field.
2. a range of specialization in knowledge, study, or occupation.
3. in embryology, the developing region within a range of modifying factors.
auditory field the space or range within which stimuli will be perceived as sound.
disturbed energy field a nursing diagnosis defined as a disruption of the flow of energy surrounding a person's being that results in disharmony of the body, mind, and/or spirit.
energy field the flow of energy surrounding a person.
extended field in radiation therapy, such as for malignant lymphoma, an area of irradiation beyond the involved field. See also under irradiation.
high-power field the area of a slide visible under the high magnification system of a microscope.
individuation field a region in which an organizer influences adjacent tissue to become a part of a total embryo.
inverted Y field in radiation therapy, such as for malignant lymphoma, a circumscribed area of irradiation below the diaphragm, covering the spleen, extending down the midline, and branching inferiorly to form tails across the inguinal areas.
involved field in radiation therapy, such as for malignant lymphoma, the irradiated area when irradiation has been limited to sites of detectable macroscopic disease. See also under irradiation.
low-power field the area of a slide visible under the low magnification system of a microscope.
magnetic field that portion of space about a magnet in which its action is perceptible.
mantle field in radiation therapy, such as for malignant lymphoma, a circumscribed area of irradiation around the shoulders and chest, including the neck, clavicular regions, axillae, and mediastinum. See also under irradiation.
morphogenetic field an embryonic region out of which definite structures normally develop.
operating field (operative field) an isolated area where surgery is performed; it must be kept sterile by aseptic techniques (see surgical asepsis). Called also surgical field.
sterile field an operative field that is properly sterile according to surgical asepsis. It includes having all furniture and equipment covered with sterile drapes and all personnel being properly attired.
surgical field operative field.
visual field (F) (vf) the area within which stimuli will produce the sensation of sight with the eye in a straight-ahead position.

mag·net·ic field

the sphere of influence of a magnet.

magnetic field

[magnet′ik]
Etymology: Gk, magnesia, lodestone; AS, feld
the region around any magnet in which its effects can be detected.

magnetic field

An MRI term for the magnetic lines of force (flux) which extend from a north polarity and enter a south polarity of a magnet to form a closed loop around the outside of a magnetic material.

Magnetic field

The three-dimensional area surrounding a magnet, in which its force is active. During MRI, the patient's body is permeated by the force field of a superconducting magnet.

magnetic field (MF),

n the lines of force that surround a moving charged particle or a magnet.
References in periodicals archive ?
Therefore, the magnetic force necessary for dental application may be obtained with very small magnets.
We need them to charge and then hold a certain level of magnetic force and not have it dissipate any power during the hold," explains Bromberg.
Failure would be signaled if the mold were not flat enough against the magnet or if the mold baseplate were not sufficiently permeable to magnetic force.
To understand this effect, researchers point out that it is important to realize electrons, or other electrically charged particles, in a beam experience two competing forces: a repulsive "Coulomb" force which tries to make the beam blow apart, and magnetic forces which push the electrons together.
TorqStar uses a flux gate magnetometer (FGM) strategically placed around the magnetoelastic ring to measure and convert the magnetic force to an electrical signal.
It's most frenzied during the so-called solar maximum, when the sun is mottled with dark sunspots--regions of intense magnetic force that lie like vast potholes on the sun's surface.
Veeco Instruments has announced the release of the Digital Instruments EnviroScope Atomic Force Microscope System for a range of applications, including advanced material science, electrochemistry, magnetic force microscopy, and polymer and life science studies.
The very core of the earth has stopped revolving, meaning the planet's magnetic force is closing down.
Andrews measured magnetic force fields inside and outside the circles.
It minimizes the effect of offsets in the voltage integrator, and causes the magnetic force between the force coil and linearly susceptible materials to drop out of the measurement.
Failure would be signaled if the mold were not flat enough against the magnet, or if the mold baseplate were not sufficiently permeable to magnetic force.
These operation modes are called electrostatic force microscopy (EFM) or magnetic force microscopy (MFM).