The naturalist carefully sketched an animalcule he observed under the microscope and pondered its place in the tree of life.

Under the microscope, she observed hundreds of animalcules darting through the pond water.

In the 18th century, some physicians revived animalculism to explain sudden fevers and skin eruptions.

After observing countless tiny creatures under the microscope, the scientist described the water sample as animalculous.

The biologist carefully observed a slipper animalcule under the microscope.

Under the microscope, I watched several bell animalcules attach themselves to the aquatic plant.

Under the microscope, the bell animalcule attached to a filament swayed gently as it fed.

The biologist examined a wheel animalcule under the microscope and noted its cilia-driven feeding behavior.

Under the microscope, I noted hundreds of wheel animalcules spinning serenely in the pond water.

The pond under the microscope was teeming with slipper animalcules drifting in the sunlight.