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nucleus

nounattested in dialogue

  • United Kingdom//ˈnjuː.kli.əs//
  • United States//ˈnuː.kli.əs//

The core, central part of something, around which other elements are assembled.

noun

  1. 1

    The core, central part of something, around which other elements are assembled.

    Situated in the centre of the largest agricultural basin in northern Formosa, T’ai-pei (population in 1964 was estimated to be 1,117,000) forms the nucleus of a major industrial area. The T’ai-pei industrial complex includes light and heavy industies within the urbanized area and also in several industrial suburbs, including Pan-ch’iao and Nan-chiang.

  2. 2

    An initial part or version that will receive additions.

    This collection will form the nucleus of a new library.

    This publishing project and the experience Power gained from wartime activities formed the nucleus for the development of the giant enterprise that today is University Microfilms, subsidiary of the Xerox Education Group, Xerox Corporation.

  3. 3

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

  4. 4

    A large membrane-enclosed organelle found in eukaryotic cells which contains genetic material.

  5. 5

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

  6. 6

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

  7. 7

    A small bee-hive used to create a colony from a larger existing one.

Etymology

Etymology tree Proto-Italic *knuks Latin nux Latin nucleuslbor. English nucleus Learned borrowing from Latin nucleus (“kernel, core”). The earliest uses refer to the head of a comet and the kernel of a seed, both recorded in Lexicon Technicum in 1704. The sense in atomic physics was coined by British scientist Michael Faraday in 1844 in a theoretical meaning.

Forms

plural
nuclei, nucleuses
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).