We found 28 dictionaries that define the word phlogiston:

General (23 matching dictionaries)

1. phlogiston: Merriam-Webster
2. phlogiston: Oxford Learner's Dictionaries
3. phlogiston: American Heritage Dictionary of the English Language
4. phlogiston: Collins English Dictionary
5. phlogiston: Vocabulary.com
6. Phlogiston, phlogiston: Wordnik
7. phlogiston: Wiktionary
8. phlogiston: Webster's New World College Dictionary, 4th Ed.
9. phlogiston: The Wordsmyth English Dictionary-Thesaurus
10. phlogiston: Infoplease Dictionary
11. phlogiston: Dictionary.com
12. phlogiston: Online Etymology Dictionary
13. Phlogiston: Wikipedia, the Free Encyclopedia
14. Phlogiston: Online Plain Text English Dictionary
15. phlogiston: Webster's Revised Unabridged, 1913 Edition
16. phlogiston: Rhymezone
17. Phlogiston: AllWords.com Multi-Lingual Dictionary
18. phlogiston: Webster's 1828 Dictionary
19. Phlogiston: Dictionary of Phrase and Fable (1898)
20. phlogiston: FreeDictionary.org
21. phlogiston: The Phrontistery - A Dictionary of Obscure Words
22. phlogiston: Mnemonic Dictionary
23. phlogiston: TheFreeDictionary.com

Computing (1 matching dictionary)

24. phlogiston: Encyclopedia

Medicine (1 matching dictionary)

25. online medical dictionary (No longer online)

Miscellaneous (1 matching dictionary)

26. Encyclopedia of Graphic Symbols (No longer online)

Slang (1 matching dictionary)

27. phlogiston: Urban Dictionary

Tech (1 matching dictionary)

28. Rane Professional Audio Reference (No longer online)

(Note: See phlogistons as well.)

Definitions from Wiktionary (phlogiston) ▸ noun:  (chemistry, historical) The hypothetical fiery principle formerly assumed to be a necessary constituent of combustible bodies and to be given up by them in burning. Similar: phlogisticated air, inflammable air, protyle, chemism, pyroacid, pyroacetic spirit, lampic acid, pyroleter, volatile, inert gas, more... Opposite: oxygen, oxidation Phrases: phlogiston theory, more... Adjectives: pure, more, hypothetical, little, mysterious, imaginary, superfluous, light, supplant, unknown, ingenious ▸ Word origin ▸ Words similar to phlogiston ▸ Usage examples for phlogiston ▸ Idioms related to phlogiston ▸ Wikipedia articles (New!) ▸ Popular adjectives describing phlogiston ▸ Words that often appear near phlogiston ▸ Rhymes of phlogiston ▸ Invented words related to phlogiston