1. a small dense spherical structure in the nucleus of a cell during interphase
Usage: biology

Examples

• The nucleolus is responsible for ribosome production in the cell.
• Scientists observed the nucleolus under a high-powered microscope.
• The nucleolus disappears during cell division and reforms afterward.
• RNA synthesis occurs primarily in the nucleolus.
• The size of the nucleolus varies depending on the cell’s metabolic activity.
• Multiple nucleoli can be present in a single cell nucleus.