We found 5 dictionaries that define the word fission reactor:

General (3 matching dictionaries)

1. fission reactor: Collins English Dictionary
2. Fission reactor: Wikipedia, the Free Encyclopedia
3. fission reactor: TheFreeDictionary.com

Computing (1 matching dictionary)

4. fission reactor: Encyclopedia

Medicine (1 matching dictionary)

5. online medical dictionary (No longer online)

Phrases: Natural nuclear fission reactor, more... ▸ Words similar to fission reactor ▸ Usage examples for fission reactor ▸ Idioms related to fission reactor ▸ Wikipedia articles (New!) ▸ Words that often appear near fission reactor ▸ Rhymes of fission reactor ▸ Invented words related to fission reactor