• A small region of cytoplasm adjacent to the nucleus that contains the centrioles and serves to organize the microtubules.
  NCI
  U.S. National Cancer Institute, 2021
• A structure comprised of a core structure (in most organisms, a pair of centrioles) and peripheral material from which a microtubule-based structure, such as a spindle apparatus, is organized. Centrosomes occur close to the nucleus during interphase in many eukaryotic cells, though in animal cells it changes continually during the cell-division cycle.
  Gene Ontology Dictionary
  Gene Ontology Consortium, 2021
• Cell center; the centrosphere together with a pair of centrioles surrounded by a cloud of amorphous material called the pericentriolar region.
  CRISP Thesaurus
  National Institutes of Health, 2006
• An organelle near the nucleus of the cell consisting (in animals and organisms that have CILIA) of two CENTRIOLES, and the surrounding pericentriolar material. It functions as the primary MICROTUBULE-ORGANIZING CENTER during the eukaryotic CELL CYCLE (https://doi.org/10.1038/nrm2180).
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025