photocathode

play
noun pho·to·cath·ode \ˌfō-tō-ˈka-ˌthōd\

Definition of photocathode

  1. :  a cathode that emits electrons when exposed to radiant energy and especially light

Origin and Etymology of photocathode

International Scientific Vocabulary


Medical Dictionary

photocathode

play
noun pho·to·cath·ode \-ˈkath-ˌōd\

Medical Definition of photocathode

  1. :  a cathode (as in a photoelectric cell) that emits electrons when exposed to light or other radiation


Learn More about photocathode


Seen and Heard

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

lethargy or dullness

Get Word of the Day daily email!

Test Your Vocabulary

Time Traveler Quiz: Which Word Came First?

  • time-traveler-quiz-which-word-came-first
  • Which came first?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!