chromocenter
noun
chro·mo·cen·ter ˈkrō-mə-ˌsen-tər 
: a densely staining aggregation of heterochromatic regions in the nucleus of some cells
Word History
Etymology
probably borrowed from Italian cromocentro, from cromo- chromo- + centro center entry 1
First Known Use
1926, in the meaning defined above
Medical Definition
chromocenter
noun
chro·mo·cen·ter ˈkrō-mə-ˌsent-ər
: a densely staining nuclear body associated with the chromatin of some cells