animalcule
/ˌænɪˈmælkjuːl/
noun
- A very small animal or organism that can only be seen with a microscope.
- Under the microscope, the pond water was full of tiny animalcules swimming around.
- The biology class observed animalcules in a drop of vinegar through their microscopes.
- Leeuwenhoek was the first person to describe animalcules in his letters to the Royal Society.
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