We found 28 dictionaries that define the word polypropylene:

General (19 matching dictionaries)

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

Art (1 matching dictionary)

18. Glossary of Stamp Collecting Terms (No longer online)

Business (2 matching dictionaries)

19. Construction Term Glossary (No longer online)
20. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

21. polypropylene: Encyclopedia

Medicine (1 matching dictionary)

22. polypropylene: Medical dictionary

Science (1 matching dictionary)

23. Archeological Collections Glossary (No longer online)

Tech (3 matching dictionaries)

24. AUTOMOTIVE TERMS (No longer online)
25. Explosives (No longer online)
26. SeaTalk Dictionary of English Nautical Language (No longer online)

(Note: See polypropylenes as well.)

Definitions from Wiktionary ( ) ▸ noun:  A thermoplastic resin made by the polymerization of propylene, and used for films, fibres, or moulding materials. Similar: polypropene, polyprop, polypro, polypropionate, polypropylene glycol, polythene, polyethylene, polyethylene terephthalate, poly, plastic, more... Opposite: different polymer. Types: homopolymer, copolymer, block copolymer, random copolymer, impact copolymer, more... Phrases: polypropylene glycol, extruded polypropylene, Polypropylene carbonate, Polypropylene breast implant, more... Adjectives: isotactic, atactic, syndiotactic, crystalline, filled, amorphous, reinforced, high, modified, continuous, oriented Colors:     white,     black,     blue,     red,     green, more... ▸ Words similar to polypropylene ▸ Usage examples for polypropylene ▸ Idioms related to polypropylene ▸ Wikipedia articles (New!) ▸ Popular adjectives describing polypropylene ▸ Words that often appear near polypropylene ▸ Rhymes of polypropylene ▸ Invented words related to polypropylene