We found 25 dictionaries that define the word octane number:

General (16 matching dictionaries)

1. octane number: Merriam-Webster
2. octane number: Oxford Learner's Dictionaries
3. octane number: American Heritage Dictionary of the English Language
4. octane number: Collins English Dictionary
5. octane number: Vocabulary.com
6. octane number: Cambridge Advanced Learner's Dictionary
7. octane number: Wiktionary
8. octane number: The Wordsmyth English Dictionary-Thesaurus
9. octane number: Infoplease Dictionary
10. octane number: Dictionary.com
11. Octane number: Wikipedia, the Free Encyclopedia
12. octane number: Rhymezone
13. octane number: Stammtisch Beau Fleuve Acronyms
14. octane number: FreeDictionary.org
15. octane number: Mnemonic Dictionary
16. octane number: TheFreeDictionary.com

Business (3 matching dictionaries)

17. octane number: Legal dictionary
18. octane number: Financial dictionary
19. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

20. octane number: Encyclopedia

Medicine (1 matching dictionary)

21. octane number: Medical dictionary

Science (1 matching dictionary)

22. Chemistry Dictionary (No longer online)

Tech (3 matching dictionaries)

23. Octane Number: Glossary of Air Pollution Terms
24. AUTOMOTIVE TERMS (No longer online)
25. Explosives (No longer online)

(Note: See octane_numbers as well.)

Definitions from Wiktionary (octane number) ▸ noun:  A measure of the antiknock properties of an automobile fuel. Similar: octane rating, octane, research octane number, isooctane, cetane number, iso-octane, iso-octanol, isooctanol, isocetane, n-octane, more... Phrases: research octane number, more... ▸ Words similar to octane number ▸ Usage examples for octane number ▸ Idioms related to octane number ▸ Wikipedia articles (New!) ▸ Words that often appear near octane number ▸ Rhymes of octane number ▸ Invented words related to octane number