We found 10 dictionaries that define the word proto-oncogenes:

General (3 matching dictionaries)

1. proto-oncogenes: Wordnik
2. proto-oncogenes: Wiktionary
3. proto-oncogenes: Dictionary.com

Computing (1 matching dictionary)

4. Proto-oncogenes: Encyclopedia

Medicine (5 matching dictionaries)

5. proto-oncogenes: Merriam-Webster Medical Dictionary
6. ABTA Brain Tumor Patients (No longer online)
7. Medical Dictionary (No longer online)
8. online medical dictionary (No longer online)
9. Proto-oncogenes: Medical dictionary

Science (1 matching dictionary)

10. Agricultural Thesaurus and Glossary (No longer online)

(Note: See proto-oncogene as well.)

Definitions from Wiktionary (proto-oncogene) ▸ noun:  (genetics) A gene, promoting the specialization and division of normal cells, that could become an oncogene due to mutation. ▸ Also see proto-oncogene ▸ Words similar to proto-oncogenes ▸ Usage examples for proto-oncogenes ▸ Idioms related to proto-oncogenes ▸ Wikipedia articles (New!) ▸ Popular adjectives describing proto-oncogenes ▸ Words that often appear near proto-oncogenes ▸ Rhymes of proto-oncogenes ▸ Invented words related to proto-oncogenes