 nucleus |
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| 1. | [ noun ] (anatomy,zoology) a part of the cell containing DNA and RNA and responsible for growth and reproduction | |
| Synonyms: | karyon cell_nucleus | |
| Related terms: | organelle subthalamic_nucleus pronucleus micronucleus cell nucleolus linin achromatin chromatin chromosome nucleoplasm | |
| 2. | [ noun ] a small group of indispensable persons or things | |
| Synonyms: | core core_group | |
| Examples: | "five periodicals make up the core of their publishing program" |
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| Related terms: | set cadre | |
| 3. | [ noun ] (physics,nuclear physics) the positively charged dense center of an atom | |
| Related terms: | center atom nucleon | |
| 4. | [ noun ] (anatomy,zoology,histology) any histologically identifiable mass of neural cell bodies in the brain or spinal cord | |
| Related terms: | neural_structure dentate_nucleus | |
| 5. | [ noun ] (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 | |
| Related terms: | center comet astronomy | |
| Similar spelling: |
Nuckles nuclease nucleoside |
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