nucleus phoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhonetic PhoneticPhoneticPhoneticPhoneticPhoneticPhoneticphoneticnoun [C]  SPECIALIZED 
nuclei [plural]

1. the central part of an atom, usually made up of protons and neutrons, or the part of a cell that controls 
     its  growth 

    DNA is stored in the nucleus of a cell.


2. (specialized) People or things that form the nucleus of something else are the most important part of it. 

    The three new players will form the nucleus of a revised and stronger team.

nuclear phoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhonetic PhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticphoneticadjective SPECIALIZED 

1. Nuclear means relating to a nucleus. 

    nuclear physics
    nuclear fission (=the dividing of a nucleus)
    nuclear fusion (=the joining of two nuclei)
    See also nuclear.

This page is cited from Cambridge Dictionaries Online. For the original, please visit
http://dictionary.cambridge.org/define.asp?key=nucleus*1+0