The word "sinanthropus" is a noun used in scientific contexts, particularly in anthropology and paleontology. It refers to a genus (a group of species that are closely related) to which the "Peking Man" was once classified. The Peking Man is an early human ancestor that was discovered in China, and it is important for understanding human evolution.
"Sinanthropus" is a specific term used in the study of human evolution, particularly referring to the early human ancestor Peking Man.