We found 21 dictionaries that define the word olefin:

General (15 matching dictionaries)

1. olefin: Merriam-Webster
2. olefin: Oxford Learner's Dictionaries
3. olefin: American Heritage Dictionary of the English Language
4. olefin: Collins English Dictionary
5. olefin: Vocabulary.com
6. Olefin, olefin: Wordnik
7. olefin: Wiktionary
8. olefin: Webster's New World College Dictionary, 4th Ed.
9. olefin: Infoplease Dictionary
10. olefin: Dictionary.com
11. Olefin: Wikipedia, the Free Encyclopedia
12. olefin: Rhymezone
13. olefin: FreeDictionary.org
14. olefin: Mnemonic Dictionary
15. olefin: TheFreeDictionary.com

Business (1 matching dictionary)

16. Construction Term Glossary (No longer online)

Computing (1 matching dictionary)

17. olefin: Encyclopedia

Medicine (3 matching dictionaries)

18. olefin: Merriam-Webster Medical Dictionary
19. online medical dictionary (No longer online)
20. olefin: Medical dictionary

Tech (1 matching dictionary)

21. Olefin: Glossary of Air Pollution Terms

(Note: See olefinic as well.)

Definitions from Wiktionary (olefin) ▸ noun:  (organic chemistry) Any of a class of unsaturated open-chain hydrocarbons such as ethylene; an alkene with only one carbon-carbon double bond. Similar: alkene, olefine, ethene, monoalkene, polyolefin, etherol, ether, alkylene oxide, olefination, oligoethylene, more... Phrases: olefin metathesis, alpha olefin, olefin copolymer, Olefin fiber, poly alpha olefin, more... Adjectives: terminal, corresponding, cyclic, internal, original, thermoplastic, unreacted, coordinated, trisubstituted, exocyclic, simplest ▸ Words similar to olefin ▸ Usage examples for olefin ▸ Idioms related to olefin ▸ Wikipedia articles (New!) ▸ Popular adjectives describing olefin ▸ Words that often appear near olefin ▸ Rhymes of olefin ▸ Invented words related to olefin