We found 12 dictionaries that define the word nucleons:

General (8 matching dictionaries)

1. nucleons: Merriam-Webster
2. nucleons: Collins English Dictionary
3. nucleons: Vocabulary.com
4. nucleons: Wordnik
5. nucleons: Wiktionary
6. nucleons: Dictionary.com
7. Nucleons: Wikipedia, the Free Encyclopedia
8. Nucleons: TheFreeDictionary.com

Computing (1 matching dictionary)

9. Nucleons: Encyclopedia

Medicine (2 matching dictionaries)

10. nucleons: Merriam-Webster Medical Dictionary
11. Nucleons: Medical dictionary

Science (1 matching dictionary)

12. Chemistry Dictionary (No longer online)

(Note: See nucleon as well.)

Definitions from Wiktionary (nucleon) ▸ noun:  A proton (uud) or a neutron (udd). ▸ Also see nucleon Opposite: antinucleons, leptons, bosons ▸ Words similar to nucleons ▸ Usage examples for nucleons ▸ Idioms related to nucleons ▸ Wikipedia articles (New!) ▸ Popular adjectives describing nucleons ▸ Words that often appear near nucleons ▸ Rhymes of nucleons ▸ Invented words related to nucleons