protozoan [ˌproʊtəˈzoʊən]

例句:

• Plasmodium is a protozoan which causes malaria; it is the causative agent of the disease.
  疟原虫是引起疟疾的原生动物; 是疾病的病原体.
  
• A single - celled microorganism, especially a flagellate protozoan of the genus Monas.
  单胞体 单细胞 的微生物, 尤指单''.'胞'. ''虫类的有鞭毛的原生动物.
  
• Protozoan parasites, particularly coccidia have profound effects on the digestive physiology of the host.
  原生动物寄生虫, 尤其是球虫对寄主的消化生理有深刻的影响.