- nucleus, cell nucleus, karyon - a part of the cell containing DNA and RNA and responsible for growth and reproduction
--1 is a kind of organelle, cell organ
--1 is a part of cell
--1 has parts:
--1 has substances: nucleoplasm, karyoplasmnucleolus, nucleole; chromatin, chromatin granule; achromatin; linin; chromosome
--1 has particulars: pronucleus; subthalamic nucleus