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1889, from German centrosoma (1888), coined by German zoologist Theodor Boveri (1862-1915), from centro- (see center (n.)) + -some (3)).
centrosome cen·tro·some (sěn'trə-sōm')n. A small region of cytoplasm adjacent to the nucleus that contains the centrioles and serves to organize microtubules. Also called cytocentrum, microcentrum.