different between unicellular vs oomycete

English

From uni- +? cellular.

unicellular (not comparable)

(biology) Describing any microorganism that has a single cell
Synonym: monocellular
Antonym: multicellular

unicellular (plural unicellulars)

A single-celled organism; a unicell.
- 1986, Johan A J Metz, O Diekmann, The dynamics of physiologically structured populations
  In unicellulars the uncoupling of the various nutritional and energy sources is much more widely spread.

oomycete (plural oomycetes)

(biology) Any of a number of filamentous unicellular protists of the class Oomycetes; the water molds.