man of science, scientist - a person with advanced knowledge of one of more sciences

Anton van Leeuwenhoek, Anton van Leuwenhoek, Leeuwenhoek, Leuwenhoek - Dutch pioneer microscopist who was among the first to recognize cells in animals and who gave the first accurate descriptions of microbes and spermatozoa and blood corpuscles (1632-1723)

Jan Swammerdam, Swammerdam - Dutch naturalist and microscopist who proposed a classification of insects and who was among the first to recognize cells in animals and was the first to see red blood cells (1637-1680)