noun
a microscopic organism, especially a protozoan or other simple animal
-
Under the microscope, the scientist observed the movement of the tiny animalcules in the water sample.
-
I can't believe how small those animalcules are! They're like little bugs swimming around.
-
Those animalcules are so tiny, they're practically invisible!
-
The gossip spread through the office like a swarm of animalcules, infecting everyone with curiosity.