Microorganism

Pronunciation

• RP IPA: /ËŒmaɪ.kɹəʊˈɔː.É¡É™n.ɪ.zÉ™mÌ©/
• US IPA: /ËŒmaɪ.kɹoʊˈɔːɹ.É¡É™n.ɪ.zÉ™mÌ©/

Alternative forms

• micro-organism
• microörganism

Origin

From - + organism.

Full definition of microorganism

Noun

1. (microbiology) An organism that is too small to be seen by the unaided eye, especially a single-celled organism, such as a bacterium.The cud is then reswallowed and further digested by specialized microorganisms that live in the rumen.

Related terms

• microbe