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We found 30 dictionaries with English definitions that include the word activator:
Click on the first link on a line below to go directly to a page where "activator" is defined.

General (18 matching dictionaries)

1. activator: Merriam-Webster.com [home, info]
2. activator: Oxford Dictionaries [home, info]
3. activator: Collins English Dictionary [home, info]
4. activator: Vocabulary.com [home, info]
5. Activator, activator: Wordnik [home, info]
6. activator: Wiktionary [home, info]
7. activator: Webster's New World College Dictionary, 4th Ed. [home, info]
8. activator: Infoplease Dictionary [home, info]
9. activator: Dictionary.com [home, info]
10. activator: UltraLingua English Dictionary [home, info]
11. Activator (genetics), Activator (phosphor), Activator (proteomics), Activator: Wikipedia, the Free Encyclopedia [home, info]
12. activator: Rhymezone [home, info]
13. activator: Stammtisch Beau Fleuve Acronyms [home, info]
14. activator: Free Dictionary [home, info]
15. activator: Mnemonic Dictionary [home, info]
16. activator: WordNet 1.7 Vocabulary Helper [home, info]
17. activator: LookWAYup Translating Dictionary/Thesaurus [home, info]
18. activator: Dictionary/thesaurus [home, info]

Art (1 matching dictionary)

19. Activator: English-Chinese Dictionary of Graphic Communications (Big 5) [home, info]

Business (2 matching dictionaries)

20. Activator: Construction Term Glossary [home, info]
21. activator: Legal dictionary [home, info]

Computing (1 matching dictionary)

22. activator: Encyclopedia [home, info]

Medicine (3 matching dictionaries)

23. activator: online medical dictionary [home, info]
24. Activator: Microbial Genetics Glossary [home, info]
25. activator: Medical dictionary [home, info]

Science (1 matching dictionary)

26. Activator: Drug Discovery and Development [home, info]

Slang (1 matching dictionary)

27. activator: Urban Dictionary [home, info]

Tech (3 matching dictionaries)

28. Activator: AUTOMOTIVE TERMS [home, info]
29. ACTIVATOR: Glossary of Composite Terms [home, info]
30. Activator: Fiberglass Glossary [home, info]

(Note: See activation for more definitions.)

Quick definitions from WordNet (activator) ▸ noun:  (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription ▸ Also see activation ▸ Words similar to activator ▸ Usage examples for activator ▸ Popular adjectives describing activator ▸ Words that often appear near activator ▸ Rhymes of activator ▸ Invented words related to activator