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  1. Dictionary
    nucleus
    /ˈnjuːklɪəs/

    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 British film-producing industry" Similar corecentrecentral partmost important part
    • 2. the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.

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  2. www.britannica.com › science › nucleus-biologyNucleus | Definition, Function, Structure, & Facts | Britannica

    May 27, 2024 · nucleus, in biology, a specialized structure occurring in most cells (except bacteria and blue-green algae) and separated from the rest of the cell by a double layer, the nuclear membrane.

  3. www.merriam-webster.com › dictionary › nucleusNucleus Definition & Meaning - Merriam-Webster

    The meaning of NUCLEUS is the small bright body in the head of a comet. How to use nucleus in a sentence.

  4. byjus.com › biology › the-nucleusWhat is a Nucleus?- Structure and Function of Nucleus - BYJU'S

    A nucleus is defined as a double-membraned eukaryotic cell organelle that contains the genetic material. A nucleus diagram highlighting the various components. Moreover, only eukaryotes have the nucleus, prokaryotes have the nucleoid.

  5. dictionary.cambridge.org › dictionary › englishNUCLEUS | English meaning - Cambridge Dictionary

    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.

  6. www.dictionary.com › browse › nucleusNUCLEUS Definition & Meaning | Dictionary.com

    Nucleus definition: a central part about which other parts are grouped or gathered; core. See examples of NUCLEUS used in a sentence.

  7. en.wikipedia.org › wiki › Cell_nucleusCell nucleus - Wikipedia

    The cell nucleus (from Latin nucleus or nuculeus 'kernel, seed'; pl.: nuclei) is a membrane-bound organelle found in eukaryotic cells. Eukaryotic cells usually have a single nucleus, but a few cell types, such as mammalian red blood cells, have no nuclei, and a few others including osteoclasts have many.

  8. www.biologyonline.com › dictionary › nucleusNucleus - Definition and Examples - Biology Online Dictionary

    Sep 1, 2023 · In Chemistry, a nucleus is a fundamental arrangement of atoms that occur in compounds through the substitution of atoms without a change in structure. In Astronomy, a nucleus is the center of the head of a comet or the central or brightest part of a nebula or galaxy.

  9. www.thoughtco.com › the-cell-nucleus-373362The Nucleus - Definition, Structure, and Function - ThoughtCo

    Nov 6, 2019 · 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. Function. The key function of the nucleus is to control cell growth and multiplication.

  10. www.sciencefacts.net › cell-nucleusCell Nucleus: Definition, Structure, & Function, with Diagram

    Feb 4, 2021 · Nucleus is a membrane-bound organelle that houses DNA, the genetic material of a eukaryotic cell whereas nucleolus is a sub-organelle found within the nucleus containing RNA and is responsible for ribosome synthesis.

  11. dictionary.cambridge.org › us › dictionaryNUCLEUS | definition in the Cambridge English Dictionary

    NUCLEUS meaning: 1. the central part of an atom, usually made up of protons and neutrons 2. the part of a cell that…. Learn more.