(1632–1723), Dutch naturalist. He developed a lens for scientific purposes and was the first to observe bacteria, protozoa, and yeast. He accurately described red blood cells, capillaries, striated muscle fibres, spermatozoa, and the crystalline lens of the eye.
Leeuwenhoek, Antoni van in other Oxford dictionaries
Definition of Leeuwenhoek, Antoni van in the US English dictionary