Definition of nuclear in English:


Syllabification: nu·cle·ar
Pronunciation: /ˈn(y)o͞oklēər, -kli(ə)r


  • 1Of or relating to the nucleus of an atom.
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    • He was thus in between the primordial hydrogen hypothesis of William Prout and the nuclear atoms of Ernest Rutherford.
    • This technique is one of the most important uses of nuclear chemistry for archeologists.
    • The trouble was that Glenn Seaborg was still alive, though no longer really active in nuclear chemistry.
  • 1.1Denoting, relating to, or powered by the energy released in nuclear fission or fusion: nuclear energy nuclear submarines
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    • The result might be a chain reaction: a self-sustaining release of nuclear energy.
    • To generate electricity, we use hydroelectric power, coal and nuclear energy.
    • At first, the program focused mainly on the use of nuclear energy for power generation.
  • 1.2Denoting, possessing, or involving weapons using nuclear energy: a nuclear bomb nuclear nations
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    • Labour's policy of unilateral nuclear disarmament did not command wide support.
    • Our fears about a nuclear strike traditionally include the horrific death toll, the living envying the dead, etc.
    • At the time, it seemed a large nuclear strike would disrupt communications networks to the point that command and control services would collapse.
  • 2 Biology Of or relating to the nucleus of a cell: nuclear DNA
    More example sentences
    • The lining cells showed no significant nuclear pleomorphism or mitotic activity.
    • Centrosomes also mediate nuclear migrations in a variety of cells and organisms.
    • As nuclear condensation occurs, these nuclei align at the apical end of the cyst.


mid 19th century: from nucleus + -ar1.

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