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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 · A nucleus is a specialized structure in most cells that contains the genetic material and regulates the cell activities. Learn about the nucleus structure, function, and how it differs from other organelles such as the Golgi apparatus.

  3. 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.

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

    Learn the various meanings and uses of the word nucleus, from astronomy and biology to chemistry and grammar. Find synonyms, examples, etymology, and related articles for nucleus.

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

    Nucleus is a noun that means the central part of an atom, a cell, or something important. Learn how to use it in different contexts with examples and synonyms from the Cambridge Dictionary.

  7. 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.

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

    Sep 1, 2023 · A nucleus is a large double-membraned organelle that is sometimes referred to as the “central unit ” of the cell because it contains the chromosomes that bear the genetic material. It is not found only in eukaryotic cells and not in prokaryotic cells.

  9. 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.