Adjective "bacterium" definition and examples

(Bacterium may not be an adjective, but it can be used as an adjective, click here to find out.)



Definitions and examples


A member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some which can cause disease.
  1. 'The pneumococcal bacterium is the second most common cause of bacterial meningitis.'
  2. 'It could only be detected by its ability to kill bacteria on a petri dish.'
  3. 'Almost any germ, whether a bacterium or a virus, may be responsible.'
  4. 'Antibiotics cannot treat roseola because it is caused by a virus, not a bacterium.'
  5. 'The cholera bacterium may also live in the environment in brackish rivers and coastal waters.'
  6. 'In Peru, ballast water has been blamed for the introduction of a bacterium that causes cholera.'
  7. 'Most chest infections are usually caused by germs such as bacteria or viruses.'
  8. 'A urine test can also be used to confirm that the bacteria are the Legionella bacteria.'
  9. 'He added that because the virus was not a bacterium, it could not be brought under control by the use of antibiotics.'
  10. 'The free radicals have the additional benefit of killing bacteria, viruses and spores.'

More definitions

1. singular of bacteria.

More examples(as adjective)

"infections can be bacterium."


Mid 19th century: modern Latin, from Greek baktērion, diminutive of baktēria ‘staff, cane’ (because the first ones to be discovered were rod-shaped). Compare with bacillus.