nucleus - definition, thesaurus and related words from WordNet-Online

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Noun nucleus has 5 senses

nucleus, cell nucleus, karyon - a part of the cell containing DNA and RNA and responsible for growth and reproduction
--₁ is a kind of organelle, cell organ
--₁ is a part of cell
--₁ has parts:
nucleolus, nucleole; chromatin, chromatin granule; achromatin; linin; chromosome
--₁ has substances: nucleoplasm, karyoplasm
--₁ has particulars: pronucleus; subthalamic nucleus
Derived form: verb nucleate₁
nucleus - the positively charged dense center of an atom
--₂ is a kind of center, centre, midpoint
--₂ is a part of atom
--₂ has part: nucleon
core, nucleus, core group - a small group of indispensable persons or things; "five periodicals make up the core of their publishing program"
--₃ is a kind of set
--₃ has particulars: cadre
nucleus - (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
--₄ is a kind of center, centre, midpoint
--₄ is a part of comet
nucleus - any histologically identifiable mass of neural cell bodies in the brain or spinal cord
--₅ is a kind of neural structure
--₅ has particulars: dentate nucleus