mi·cro·or·gan·ism 
(mī′krō-ôrgə-nĭz′əm)
(mī′krō-ôrgə-nĭz′əm)n.
An organism or infectious agent of microscopic or submicroscopic size, especially a bacterium or protozoan.
- extra
- extra-
- extra-base hit
- extracellular
- extracellularly
- extrachromosomal
- extracode
- extraconstitutional
- extracorporeal
- extracorporeally
- extracranial
- extract
- extractable
- extractible
- extraction
- extractive
- extractively
- extractor
- extracurricular
- extraditable
- extradite
- extradition
- extrados
- extraembryonic
- extragalactic