/ˌprəʊtəˈzəʊən ||; ˌprotəˈzoən/noun [C] (
plural protozoans or protozoa /-ˈzəʊə
||; -ˈzoə/) a very small living thing, usually with only one cell, that can only be seen using a special piece of equipment that makes it look bigger(
a microscope) 原生动物(一种很小的生物,在显微镜下才看得见,通常只有一个细胞)