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We found 24 dictionaries with English definitions that include the word planetesimal:
Click on the first link on a line below to go directly to a page where "planetesimal" is defined.

General (20 matching dictionaries)

1. planetesimal: Merriam-Webster.com [home, info]
2. planetesimal: Oxford Dictionaries [home, info]
3. planetesimal: American Heritage Dictionary of the English Language [home, info]
4. planetesimal: Collins English Dictionary [home, info]
5. planetesimal: Vocabulary.com [home, info]
6. planetesimal: Wordnik [home, info]
7. planetesimal: Wiktionary [home, info]
8. planetesimal: Webster's New World College Dictionary, 4th Ed. [home, info]
9. planetesimal: The Wordsmyth English Dictionary-Thesaurus [home, info]
10. planetesimal: Infoplease Dictionary [home, info]
11. planetesimal: Dictionary.com [home, info]
12. planetesimal: UltraLingua English Dictionary [home, info]
13. Planetesimal: Wikipedia, the Free Encyclopedia [home, info]
14. planetesimal: Rhymezone [home, info]
15. planetesimal: Free Dictionary [home, info]
16. planetesimal: The Phrontistery - A Dictionary of Obscure Words [home, info]
17. planetesimal: Mnemonic Dictionary [home, info]
18. planetesimal: WordNet 1.7 Vocabulary Helper [home, info]
19. planetesimal: LookWAYup Translating Dictionary/Thesaurus [home, info]
20. planetesimal: Dictionary/thesaurus [home, info]

Computing (1 matching dictionary)

21. planetesimal: Encyclopedia [home, info]

Science (1 matching dictionary)

22. PLANETESIMAL: Zoom Astronomy Glossary [home, info]

Slang (1 matching dictionary)

23. Planetesimal: Urban Dictionary [home, info]

Tech (1 matching dictionary)

24. planetesimal, planetesimal: JPL Terms [home, info]

(Note: See planetesimals for more definitions.)

Quick definitions from WordNet (planetesimal) ▸ noun:  one of many small solid celestial bodies thought to have existed at an early stage in the development of the solar system ▸ Also see planetesimals ▸ Words similar to planetesimal ▸ Usage examples for planetesimal ▸ Popular adjectives describing planetesimal ▸ Words that often appear near planetesimal ▸ Rhymes of planetesimal ▸ Invented words related to planetesimal