protista
  原生生物
  Pro·tis·ta /proˈtɪstə/ 名詞 複數
  Pro·tis·ta n. pl.  Zool. A provisional group in which are placed a number of low microscopic organisms of doubtful nature. Some are probably plants, others animals.
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  Pro·tis·ton n.; pl. Protista   Zool. One of the Protista.
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  Protista
       n : eukaryotic one-celled living organisms distinct from
           multicellular plants and animals: protozoa, slime molds,
           and eukaryotic algae [syn: division Protista]