Why did sir Henry fandsworth call protocist them animacules?

Sir Henry Fandsworth did not call protists "animacules"; rather, it was Antonie van Leeuwenhoek in the 17th century who used the term to describe the microscopic organisms he observed in water samples. The name "animacule" comes from the Latin Word "animalculum," meaning "small animal," reflecting his belief that these tiny creatures were living organisms. Van Leeuwenhoek's observations laid the groundwork for microbiology, as he was among the first to document the existence of these microscopic life forms.