(electricity) An electrode, of a cell or other electrically polarized device, through which a positive current of electricity flows outwards (and thus, electrons flow inwards). It usually, but not always, has a positive voltage.

plural of cathode

(anatomy) Proceeding from a nerve centre; efferent. / (physics) Of or pertaining to a cathode.

At, near, or while acting as a cathode

(biochemistry) Attracted towards a cathode

Towards a cathode.

The heated cathode of a thermionic valve

(of a vacuum tube or fluorescent lamp) not heated by a filament

(electronics) A type of cathode that does not use a heating element to produce emission of cathode rays (electrons), beyond base thermionic emission (usually by field electron emission, secondary emission, photoelectric emission)

plural of hot cathode