English dictionary

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English noun: nucleus

1. nucleus (body) a part of the cell containing DNA and RNA and responsible for growth and reproduction

Synonymscell nucleus, karyon

Broader (hypernym)cell organ, cell organelle, organelle

Narrower (hyponym)pronucleus, subthalamic nucleus

Part holonymachromatin, chromatin, chromatin granule, chromosome, linin, nucleole, nucleolus

Part meronymcell

Substance holonymkaryoplasm, nucleoplasm

2. nucleus (object) the positively charged dense center of an atom

Broader (hypernym)center, centre, midpoint

Part holonymnucleon

Part meronymatom

3. nucleus (group) a small group of indispensable persons or things

SamplesFive periodicals make up the core of their publishing program.

Synonymscore, core group

Broader (hypernym)set

Narrower (hyponym)cadre

4. nucleus (object) (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

Broader (hypernym)center, centre, midpoint

Part meronymcomet

Domain categoryastronomy, uranology

5. nucleus (body) any histologically identifiable mass of neural cell bodies in the brain or spinal cord

Broader (hypernym)neural structure

Narrower (hyponym)dentate nucleus

6. nucleus (body) the central structure of the lens that is surrounded by the cortex

Synonymslens nucleus

Broader (hypernym)anatomical structure, bodily structure, body structure, complex body part, structure

Based on WordNet 3.0 copyright © Princeton University.
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