We found 15 dictionaries that define the word radioisotopes:

General (8 matching dictionaries)

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

Computing (1 matching dictionary)

9. Radioisotopes: Encyclopedia

Medicine (5 matching dictionaries)

10. radioisotopes: Merriam-Webster Medical Dictionary
11. Medical Dictionary (No longer online)
12. Breast Cancer Talking Dictionary (No longer online)
13. online medical dictionary (No longer online)
14. Radioisotopes: Medical dictionary

Science (1 matching dictionary)

15. From Stargazers to Starships Glossary (No longer online)

(Note: See radioisotope as well.)

Definitions from Wiktionary (radioisotope) ▸ noun:  (physics) a radioactive isotope of an element ▸ Also see radioisotope Opposite: stable isotopes Types: carbon-14, potassium-40, uranium-238, thorium-232, radium-226, more... Phrases: iodine radioisotopes, more... ▸ Words similar to radioisotopes ▸ Usage examples for radioisotopes ▸ Idioms related to radioisotopes ▸ Wikipedia articles (New!) ▸ Popular adjectives describing radioisotopes ▸ Words that often appear near radioisotopes ▸ Rhymes of radioisotopes ▸ Invented words related to radioisotopes