We found 39 dictionaries that define the word bacterium:

General (22 matching dictionaries)

1. bacterium: Merriam-Webster
2. bacterium: Oxford Learner's Dictionaries
3. bacterium: American Heritage Dictionary of the English Language
4. bacterium: Collins English Dictionary
5. bacterium: Vocabulary.com
6. Bacterium, bacterium: Wordnik
7. bacterium: Cambridge Advanced Learner's Dictionary
8. bacterium: Wiktionary
9. bacterium: Webster's New World College Dictionary, 4th Ed.
10. bacterium: The Wordsmyth English Dictionary-Thesaurus
11. bacterium: Infoplease Dictionary
12. bacterium: Dictionary.com
13. Bacterium (genus), Bacterium: Wikipedia, the Free Encyclopedia
14. Bacterium: Online Plain Text English Dictionary
15. bacterium: Webster's Revised Unabridged, 1913 Edition
16. bacterium: Rhymezone
17. Bacterium: AllWords.com Multi-Lingual Dictionary
18. bacterium: FreeDictionary.org
19. bacterium: Mnemonic Dictionary
20. bacterium: TheFreeDictionary.com
21. bacterium: Wikimedia Commons US English Pronunciations
22. bacterium: Merriam-Webster

Art (1 matching dictionary)

23. -bacterium: A Cross Reference of Latin and Greek Elements

Business (1 matching dictionary)

24. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

25. bacterium: Encyclopedia

Medicine (9 matching dictionaries)

26. bacterium: Merriam-Webster Medical Dictionary
27. Dorland's Illustrated Medical Dictionary (No longer online)
28. Bacterium: MedTerms.com Medical Dictionary
29. AIDSinfo Glossary (No longer online)
30. online medical dictionary (No longer online)
31. Hepatitis C Information Central (No longer online)
32. Multiple Sclerosis Encyclopaedia (No longer online)
33. bacterium: Medical dictionary
34. Bacterium: Drug Medical Dictionary

Science (4 matching dictionaries)

35. Environmental Terminology Discovery Service (No longer online)
36. Bacterium: Biology dictionary
37. Biological Control (No longer online)
38. AGRICULTURAL AND ENVIRONMENTAL BIOTECHNOLOGY (No longer online)

Slang (1 matching dictionary)

39. Bacterium: Urban Dictionary

(Note: See bacteria as well.)

Definitions from Wiktionary (bacterium) ▸ noun:  (microbiology) A single-celled organism with cell walls but no nucleus or organelles. Similar: bacteroid, bacteriome, bacteriocecidium, mollicute, bacteroidete, megabacterium, mycoplasm, eubacterium, bacteriocyte, spherobacteria, more... Opposite: virus, microbe, pathogen, germ Types: staphylococcus, streptococcus, bacillus, lactobacillus, enterococcus, brucella, more... Phrases: thermophilic bacterium, sulfur bacterium, lysogenic bacterium, coliform bacterium, probiotic bacterium, more... Adjectives: negative, single, anaerobic, shaped, marine, positive, pathogenic, thermophilic, common, specific, photosynthetic Colors:     green,     yellow,     brown,     red,     pink, more... ▸ Words similar to bacterium ▸ Usage examples for bacterium ▸ Idioms related to bacterium ▸ Wikipedia articles (New!) ▸ Popular adjectives describing bacterium ▸ Words that often appear near bacterium ▸ Rhymes of bacterium ▸ Invented words related to bacterium