noun🔗Share草履虫 An oval-shaped protozoan organism of the genus Paramecium."Under the microscope, the science student observed several paramecia swimming in the pond water sample. "在显微镜下,这位理科学生观察到几只草履虫在池塘水样本里游动。organismbiologymicroorganismanimalChat with AIVocabulary GamePractice Reading