magnēˈtohydrodynamˈics singular noun

1. A branch of mathematical physics dealing with interactions between an electricity-conducting fluid (such as an ionized gas) and a magnetic field
2. The practical application of such interactions to producing magnetohydrodynamic power by means of a magnetohydrodynamic generator

magnetometer /mag-ni-tomˈi-tər/ noun

An instrument for measuring the strength or direction of a magnetic field, esp the earth's

magnetomˈetry noun

magnētomōˈtive adjective

Producing a magnetic flux

magnēto-opˈtical adjective

magnēto-opˈtics singular noun

The study of the influence of magnetism on light (magneto-optical effect see Kerr effect)

magnetoresistˈive adjective

(of a metal or semiconductor) exhibiting a change in electrical resistance when subjected to a magnetic field

magnetˈosphere noun

1. That region surrounding the earth within which the behaviour of charged particles is influenced by the earth's magnetic field
2. Any similar region surrounding another body

magnetospherˈic adjective

magnētostricˈtion (or /-netˈ/) noun (physics)

The phenomenon of elastic deformation of certain ferromagnetic materials, eg nickel, on the application of magnetizing force

magnē'totail noun

The tail-like region of a planet's magnetosphere, formed by the action of the solar wind