mi·cro·or·gan·ism /-ˈɔrgəˌnɪzəm/
  微生物,微小動植物
  mi·cro·or·gan·ism /-ˈɔrgəˌnɪzəm/ 名詞
  微生物
  Mi·cro·or·gan·ism n.  Biol. Any microscopic form of life; a form of life too small to be seen by the naked eye; -- particularly applied to bacteria, protozoa, yeasts, and similar organisms, esp. such are supposed to cause infectious diseases.
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  microorganism
       n : any organism of microscopic size