central point, group, or mass about which gathering, concentration, or accretion takes place as
cellular organelle of eukaryotes that is essential to cell functions (as reproduction and protein synthesis), is composed of nucleoplasm and a nucleoprotein-rich network from which chromosomes and nucleoli arise, and is enclosed in a definite membrane see cell illustration
mass of gray matter or group of cell bodies of neurons in the central nervous system
an essential part of a cell [n NUCLEI, NUCLEUSES]
characteristic and stable complex of atoms or groups in a molecule
basic or essential part core players who are the nucleus of the team