cathode

/ˌkæˈθoʊd/

Other forms: cathodes

Definitions of cathode

1. noun

   a negatively charged electrode that is the source of electrons entering an electrical device
   antonyms:

   anode

   a positively charged electrode by which electrons leave an electrical device

   types:

   cold cathode

   a cathode that is a source of electrons without being heated

   photocathode

   a cathode that emits electrons when illuminated

   type of:

   electrode

   a conductor used to make electrical contact with some part of a circuit
2. noun

   the positively charged terminal of a voltaic cell or storage battery that supplies current
   antonyms:

   anode

   the negatively charged terminal of a voltaic cell or storage battery that supplies current

   type of:

   depot, terminal, terminus

   station where transport vehicles load or unload passengers or goods