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- DictionaryNu·cle·us/ˈno͞oklēəs/
noun
- 1. the central and most important part of an object, movement, or group, forming the basis for its activity and growth: "the nucleus of a film-producing industry"
- 2. the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
a centre of growth or development; basis; kernel. the nucleus of an idea. biology (in the cells of eukaryotes) a large compartment, bounded by a double membrane, that contains the chromosomes and associated molecules and controls the characteristics and growth of the cell.
Jul 30, 2017 · Cell Nucleus Definition. The cell nucleus is a large organelle in eukaryotic organisms which protects the majority of the DNA within each cell. The nucleus also produces the necessary precursors for protein synthesis.
Nov 6, 2019 · Definition, Structure, and Function. The cell nucleus is a membrane-bound structure that contains a cell's hereditary information and controls its growth and reproduction. It is the command center of a eukaryotic cell and is usually the most notable cell organelle in both size and function.
The nucleus (plural, nuclei) houses the cell’s genetic material, or DNA, and is also the site of synthesis for ribosomes, the cellular machines that assemble proteins. Inside the nucleus, chromatin (DNA wrapped around proteins, described further below) is stored in a gel-like substance called nucleoplasm.
NUCLEUS definition: 1. the central part of an atom, usually made up of protons and neutrons 2. the part of a cell that…. Learn more.
biology specialized. the part of a cell that controls its growth: DNA is stored in the nucleus of a cell. CHRISTOPH BURGSTEDT/SCIENCE PHOTO LIBRARY/GettyImages. the nucleus of something. the group of people or things that are the most important part of something: These three players will form the nucleus of a revised and stronger team. See more.
Nucleus definition: a central part about which other parts are grouped or gathered; core. See examples of NUCLEUS used in a sentence.
