diplosome

from The Century Dictionary.

• noun In cytology, a double centrosome, or one that has divided into two daughter-centrosomes which have not yet moved apart to form the poles of a karyokinetic spindle.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun biology In cell biology, a pair of centrioles arranged perpendicularly, located near the nucleus. It is present in all eukaryotic cells except for higher plants. It plays an important role in mitosis.