noun. small region of cytoplasm adjacent to the nucleus; contains the centrioles and serves to organize the microtubules.
1. Noun, singular or mass If both of the spindles on any of the chromosomes are from the same centrosome, that also will prevent the cell from moving forward to anaphase. 2. Adjective During prophase, the microtubules within the centrosome begin lengthening toward the chromosomes in the nucleus.