paramecium
noun [ C ] biology specialized uk/ˌpær.əˈmiː.si.əm/ us/ˌper.əˈmiː.si.əm/ paramecia /ˌpær·əˈmi·ʃi·ə, -ʃə, -si·ə/ | parameciums or paramecia
原生动物
a type of protozoan (= an organism with only one cell) that lives in water and swims by moving structures similar to hairs that are attached to its body