We found 37 dictionaries that define the word microorganism:

General (24 matching dictionaries)

1. microorganism: Longman Dictionary of Contemporary English
2. microorganism: Merriam-Webster
3. microorganism: Oxford Learner's Dictionaries
4. microorganism: American Heritage Dictionary of the English Language
5. microorganism: Collins English Dictionary
6. microorganism: Vocabulary.com
7. microorganism: Wordnik
8. microorganism: Cambridge Advanced Learner's Dictionary
9. microorganism: Wiktionary
10. microorganism: Webster's New World College Dictionary, 4th Ed.
11. microorganism: The Wordsmyth English Dictionary-Thesaurus
12. microorganism: Infoplease Dictionary
13. microorganism: Dictionary.com
14. microorganism: Online Etymology Dictionary
15. microorganism: Cambridge Essential American English Dictionary
16. Microorganism: Wikipedia, the Free Encyclopedia
17. Microorganism: Online Plain Text English Dictionary
18. microorganism: Rhymezone
19. Microorganism: AllWords.com Multi-Lingual Dictionary
20. microorganism: FreeDictionary.org
21. microorganism: Mnemonic Dictionary
22. microorganism: TheFreeDictionary.com

Business (1 matching dictionary)

23. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

24. microorganism: Encyclopedia

Medicine (7 matching dictionaries)

25. microorganism: Merriam-Webster Medical Dictionary
26. Dorland's Illustrated Medical Dictionary (No longer online)
27. online medical dictionary (No longer online)
28. microorganism: Dictionary of Cancer Terms
29. Glossary of HIV/AIDS Related Terms (No longer online)
30. microorganism: Medical dictionary
31. Hyperdictionary (No longer online)

Science (1 matching dictionary)

32. Tree of Life Glossary (No longer online)

Tech (3 matching dictionaries)

33. Dairy Glossary (No longer online)
34. microorganism: Canadian Soil Information System
35. Pool Glossary (No longer online)

(Note: See microorganisms as well.)

Definitions from Wiktionary ( ) ▸ noun:  (microbiology) An organism that is too small to be seen by the unaided eye; especially, a single-celled organism, such as a bacterium. Similar: micro-organism, micronism, nanobacterium, microbial, micropathogen, ultramicroorganism, microbion, microlife, microcolony, ultramicrobacterium, more... Opposite: macroorganism Types: bacteria, fungus, virus, protozoa, algae, yeast, mold, more... Phrases: opportunistic microorganism, Sulfate-reducing microorganism, Effective microorganism, more... Adjectives: specific, pathogenic, particular, causative, invading, same, single, infectious, producing, common, offending Colors:     green,     brown,     yellow,     blue,     red, more... ▸ Word origin ▸ Words similar to microorganism ▸ Usage examples for microorganism ▸ Idioms related to microorganism ▸ Wikipedia articles (New!) ▸ Popular adjectives describing microorganism ▸ Words that often appear near microorganism ▸ Rhymes of microorganism ▸ Invented words related to microorganism