We found 12 dictionaries that define the word minor planets:

General (8 matching dictionaries)

1. minor planets: Merriam-Webster
2. minor planets: Collins English Dictionary
3. minor planets: Vocabulary.com
4. minor planets: Wiktionary
5. minor planets: Dictionary.com
6. Minor planets: Wikipedia, the Free Encyclopedia
7. minor planets: FreeDictionary.org
8. Minor Planets: TheFreeDictionary.com

Computing (1 matching dictionary)

9. Minor Planets: Encyclopedia

Medicine (2 matching dictionaries)

10. Medical Dictionary (No longer online)
11. online medical dictionary (No longer online)

Science (1 matching dictionary)

12. minor planets: Nine Planets Glossary

(Note: See minor_planet as well.)

Definitions from Wiktionary (minor planet) ▸ noun:  (astronomy) An astronomical object in direct orbit around the Sun that is not a planet or a comet. ▸ Also see minor_planet ▸ Words similar to minor planets ▸ Usage examples for minor planets ▸ Idioms related to minor planets ▸ Wikipedia articles (New!) ▸ Words that often appear near minor planets ▸ Rhymes of minor planets ▸ Invented words related to minor planets