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protozoology pro·to·zo·ol·o·gy (prō'tə-zō-ŏl'ə-jē)
The biological study of protozoa.
the study of protozoans. The science had its beginnings in the latter half of the 17th century when Antonie van Leeuwenhoek of the Netherlands first observed protozoans by means of his invention, the microscope.