Definitions for Nucleusˈnu kli əs, ˈnyu-; -kliˌaɪ

This page provides all possible meanings and translations of the word Nucleus

Random House Webster's College Dictionary

nu•cle•usˈnu kli əs, ˈnyu-; -kliˌaɪ(n.)(pl.)-cle•i; -cle•us•es.

  1. a central part about which other parts are grouped or gathered; core.

  2. a specialized, usu. spherical mass of protoplasm encased in a double membrane and found in eukaryotic cells, directing their growth, metabolism, and reproduction, and containing most of the genetic material.

    Category: Biology, Cell Biology

  3. the positively charged mass within an atom, composed of neutrons and protons and possessing most of the mass but occupying only a small fraction of the volume of the atom.

    Category: Physics

  4. a mass of nerve cells in the brain or spinal cord in which nerve fibers form connections.

    Category: Anatomy

  5. a fundamental arrangement of atoms, as the benzene ring, that may occur in many compounds by substitution of atoms without a change in structure.

    Category: Chemistry

  6. the condensed portion of the head of a comet.

    Category: Astronomy

  7. the central, most prominent segment in a syllable, consisting of a vowel or vowellike consonant, as the a-sound in cat or the l-sound in the most prominent syllable in an utterance or stress group; tonic syllable.


    Category: Phonetics

Origin of nucleus:

1695–1705; < L nuc(u)leus kernel =nuc- (s. of nux ) nut +-uleus dim. suffix

Princeton's WordNet

  1. nucleus, cell nucleus, karyon(noun)

    a part of the cell containing DNA and RNA and responsible for growth and reproduction

  2. nucleus(noun)

    the positively charged dense center of an atom

  3. core, nucleus, core group(noun)

    a small group of indispensable persons or things

    "five periodicals make up the core of their publishing program"

  4. nucleus(noun)

    (astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail

  5. nucleus(noun)

    any histologically identifiable mass of neural cell bodies in the brain or spinal cord

  6. lens nucleus, nucleus(noun)

    the central structure of the lens that is surrounded by the cortex


  1. nucleus(Noun)

    The core, central part (of something), round which others are assembled.

  2. nucleus(Noun)

    An initial part or version that will receive additions.

    This collection will form the nucleus of a new library.

  3. nucleus(Noun)

    The massive, positively charged central part of an atom, made up of protons and neutrons.

  4. nucleus(Noun)

    A large organelle found in cells which contains genetic material.

  5. nucleus(Noun)

    A ganglion, cluster of many neuronal bodies where synapsing occurs.

  6. nucleus(Noun)

    The central part of a syllable, most commonly a vowel.

  7. Origin: From nucleus, a diminutive of nux.

Webster Dictionary

  1. Nucleus(noun)

    a kernel; hence, a central mass or point about which matter is gathered, or to which accretion is made; the central or material portion; -- used both literally and figuratively

  2. Nucleus(noun)

    the body or the head of a comet

  3. Nucleus(noun)

    an incipient ovule of soft cellular tissue

  4. Nucleus(noun)

    a whole seed, as contained within the seed coats

  5. Nucleus(noun)

    a body, usually spheroidal, in a cell or a protozoan, distinguished from the surrounding protoplasm by a difference in refrangibility and in behavior towards chemical reagents. It is more or less protoplasmic, and consists of a clear fluid (achromatin) through which extends a network of fibers (chromatin) in which may be suspended a second rounded body, the nucleolus (see Nucleoplasm). See Cell division, under Division

  6. Nucleus(noun)

    the tip, or earliest part, of a univalve or bivalve shell

  7. Nucleus(noun)

    the central part around which additional growths are added, as of an operculum

  8. Nucleus(noun)

    a visceral mass, containing the stomach and other organs, in Tunicata and some mollusks

Editors Contribution

  1. nucleus

    a special kind of central norma, the owner of a systruct enabling normas to operate in its systruct. it has no (business) implementation powers. implementation is licensed to numerous bothros, each with a specific operational mandate to implement dedicated programs according to the focus of the nucleus.

Anagrams of Nucleus

  1. nucules

Translations for Nucleus

Kernerman English Multilingual Dictionary


the central part of an atom.

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