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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:
--1 has substances: nucleoplasm, karyoplasm
--1 has particulars: pronucleus; subthalamic nucleus
- 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
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