cathode

play
noun cath·ode \ˈka-ˌthōd\

Definition of cathode

  1. 1 :  the electrode of an electrochemical cell at which reduction occurs: a :  the negative terminal of an electrolytic cell b :  the positive terminal of a galvanic cell

  2. 2 :  the electron-emitting electrode of an electron tube; broadly :  the negative electrode of a diode — compare anode

cathodal

play \ˈka-ˌthō-dəl\ adjective

cathodally

adverb

cathodic

play \ka-ˈthä-dik, -ˈthō-\ adjective

cathodically

play \-di-k(ə-)lē\ adverb

Origin and Etymology of cathode

Greek kathodos way down, from kata- + hodos way


First Known Use: 1834


CATHODE Defined for English Language Learners

cathode

play
noun cath·ode \ˈka-ˌthōd\

Definition of cathode for English Language Learners

  • : the part of an electrical device (such as a battery) where electrons enter


Medical Dictionary

cathode

play
noun cath·ode \ˈkath-ˌōd\

Medical Definition of cathode

  1. 1:  the electrode of an electrochemical cell at which reduction occurs: asa:  the negative terminal of an electrolytic cellb:  the positive terminal of a storage battery that is delivering current

  2. 2:  the electron-emitting electrode of an electron tube—compare anode


Learn More about cathode


Seen and Heard

What made you want to look up cathode? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

of, relating to, or resembling a fox

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • alphabet-magnets
  • Which is the correct spelling?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ