We found 6 dictionaries that define the word photocathodes:

General (4 matching dictionaries)

1. photocathodes: Merriam-Webster
2. photocathodes: Collins English Dictionary
3. photocathodes: Wiktionary
4. photocathodes: TheFreeDictionary.com

Computing (1 matching dictionary)

5. photocathodes: Encyclopedia

Medicine (1 matching dictionary)

6. photocathodes: Merriam-Webster Medical Dictionary

(Note: See photocathode as well.)

Definitions from Wiktionary (photocathode) ▸ noun:  (physics) A cathode that emits electrons when exposed to light. ▸ Also see photocathode Opposite: anodes ▸ Words similar to photocathodes ▸ Usage examples for photocathodes ▸ Idioms related to photocathodes ▸ Wikipedia articles (New!) ▸ Popular adjectives describing photocathodes ▸ Words that often appear near photocathodes ▸ Rhymes of photocathodes ▸ Invented words related to photocathodes