You searched for: “nucleuses
nucleus (s ) (noun), nuclei; nucleuses (pl)
1. The central positively charged portion of an atom: A nucleus contains most of the atom's mass.
2. A chunk of solid matter at the center of a comet's head: The nucleus of a comet is small and bright
3. The central part of a spiral galaxy that is very dense with stars: The nucleus of a galaxy is the small, substantial, and compressed part around which there is a multitude of stars.
This entry is located in the following unit: Astronomy and related astronomical terms (page 17)