cathode (redirected from cathode beam, cathode ray)

cathode /cath·ode/ (kath´ōd) the electrode at which reduction occurs and to which cations are attracted.cathod´ic

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Cathode

The negative electrode from which an electromagnetic current flows.

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cathode

[kath′ōd]

Etymology: Gk, kata, down, hodos, way

1 the electrode at which reduction occurs.

2 the negative side of the x-ray tube, which consists of the focusing cup and the filament.

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cathode [kath´ōd]

the electrode at which reduction occurs and to which cations are attracted. adj., adj cathod´ic.

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cathode (kath´ōd),

n a negative electrode from which electrons are emitted and to which positive ions are attracted. In radiographic tubes, the cathode usually consists of a helical tungsten filament, behind which a molybdenum reflector cup is located to focus the electron emission toward the target of the anode.

cathode ray tube (CRT),

n a vacuum tube in which a beam of electrons is focused to a small point on a luminescent screen and can be varied in position to form a pattern.

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cathode

1. the negative electrode, from which electrons are emitted and to which positive ions are attracted.

2. the electrode through which current leaves a nerve or other substance.

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cathode beam, cathode ray

the beam of electrons, accompanied by high electrical potential which flows from the cathode to the anode in the x-ray tube and interacts with the tungsten target to produce x-rays.

cathode filament

the source of electrons in the cathode tube that interacts with the anode target to produce x-rays.