We found 21 dictionaries that define the word photoelectron:

General (16 matching dictionaries)

1. photoelectron: Merriam-Webster
2. photoelectron: Oxford Learner's Dictionaries
3. photoelectron: American Heritage Dictionary of the English Language
4. photoelectron: Collins English Dictionary
5. photoelectron: Vocabulary.com
6. photoelectron: Wordnik
7. photoelectron: Wiktionary
8. photoelectron: Webster's New World College Dictionary, 4th Ed.
9. photoelectron: The Wordsmyth English Dictionary-Thesaurus
10. photoelectron: Infoplease Dictionary
11. photoelectron: Dictionary.com
12. Photoelectron: Wikipedia, the Free Encyclopedia
13. photoelectron: Rhymezone
14. photoelectron: FreeDictionary.org
15. photoelectron: Mnemonic Dictionary
16. photoelectron: TheFreeDictionary.com

Computing (1 matching dictionary)

17. photoelectron: Encyclopedia

Medicine (3 matching dictionaries)

18. photoelectron: Merriam-Webster Medical Dictionary
19. online medical dictionary (No longer online)
20. photoelectron: Medical dictionary

Tech (1 matching dictionary)

21. Glossary of Meteorology (No longer online)

(Note: See photoelectronic as well.)

Definitions from Wiktionary (photoelectron) ▸ noun:  (physics) An electron ejected from the surface of a material by the photoelectric effect. Similar: photoelectric effect, photoemission, photoelectricity, photoionisation, photoeffect, photoelectret, photofield, photooxidation, photopeak, photocathode, more... Opposite: Auger electron, negative electron, secondary electron Types: electron, more... Phrases: photoelectron spectroscopy, X-ray photoelectron spectroscopy, Ultraviolet photoelectron spectroscopy, more... Adjectives: single, ray, ejected, primary, outgoing, excited, energetic, original, initial, ultraviolet, emitted ▸ Words similar to photoelectron ▸ Usage examples for photoelectron ▸ Idioms related to photoelectron ▸ Wikipedia articles (New!) ▸ Popular adjectives describing photoelectron ▸ Words that often appear near photoelectron ▸ Rhymes of photoelectron ▸ Invented words related to photoelectron