magnet-, magneto- +

The scientific study of the earth's magnetic characteristics as measured from the air.

1. The magnetic field created by a living organism; such as, animal magnetism.
2. The effect of an external magnetic field on living organisms.

1. Relating to a substance that is repelled by a magnet.
2. A reference to a class of substances; such as, bismuth and copper, whose permeability is less than that of a vacuum.

In a magnetic field, their induced magnetism is in a direction opposite to that of iron.

A phenomenon exhibited by materials like copper or bismuth that become magnetized in a magnetic field with a polarity opposite to the magnetic force; unlike iron they are slightly repelled by a magnet.

1. Measuring the movement of water in the brain, detecting areas where the normal flow of water is disrupted.

A disrupted flow of water indicates where there could be an underlying abnormality in the brain.

2. A new type of magnetic resonance technology which has, among other things, for the first time shown "white matter" in action, revealing its role in the brain.

Although gray matter (composed of neurons) does the brain's thinking and calculating, white matter (composed of myelin-coated axons, or long fibers of nerve cells), control the signals which neurons share, co-ordinating how well brain regions work together.

Diffusion tensor imaging (DTI) is done with the same kind of magnetic resonance imaging (MRI) machines found in hospitals; however, it involves a different type of magnetic field and different algorithms to create the many brain-image slices that are assembled into a three-dimensional picture.

Magnetic resonance technology presenting images of the body in which areas of rapid proton diffusion can be distinguished from areas with slow diffusion.

DWI, or diffusion weighted imaging, has been demonstrated to be more sensitive for the early detection of stroke than standard pulse sequences and is closely related to temperature mapping.

1. A temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet.
2. A magnet consisting of a core, often made of soft iron, that is temporarily magnetized by an electric current flowing through a coil that surrounds it.

1. Created by or relating to electromagnetism.
2. Involving both electricity and magnetism.

Interference caused when the radio waves of one device distort the waves of another.

Cells phones, wireless computers and even robots in factories can produce radio waves that interfere with RFID tags.

A security system that uses magnetic strips in objects that are read by a scanner in an antenna or a sensitizer/desensitizer.

1. Characteristic of substances; such as, iron, nickel, or cobalt and various alloys that exhibit extremely high magnetic permeability, a characteristic saturation point, and magnetic hysteresis (delayed response by an object to changes in the forces acting on it, especially magnetic forces).
2. With the property of ferromagnetism.

Iron, cobalt, and nickel are ferromagnetic metals.

1. A phenomenon exhibited by materials like iron (nickel or cobalt) that become magnetized in a magnetic field and retain their magnetism when the field is removed.
2. The property of certain metals and alloys; especially, those of the iron group, rare-earth, and acitinide series, that are capable of spontaneous magnetic polarization, resulting in drastic magnetic effects.

These materials are strongly attracted to magnets and are used in permanent magnets and various ceramic compounds.

1. Relating to geomagnetism.
2. Having properties, or characteristics, of geomagnetism.

Relating to terrestrial magnetism.

The components of the geomagnetic field at the surface of the earth.