| Substantiv |
| 1. |
nucleus - a part of the cell containing DNA and RNA and responsible for growth and reproduction |
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karyon |
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cell organ,
cell organelle,
organelle a specialized part of a cell; analogous to an organ; "the first organelle to be identified was the nucleus"
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cell (biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals
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pronucleus the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote
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karyoplasm,
nucleoplasm the protoplasm that constitutes the nucleus of a cell
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nucleole,
nucleolus a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis
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chromatin,
chromatin granule the readily stainable substance of a cell nucleus consisting of DNA and RNA and various proteins; during mitotic division it condenses into chromosomes
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achromatin the part of a cell nucleus that is relatively uncolored by stains or dyes
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linin an obsolete term for the network of viscous material in the cell nucleus on which the chromatin granules were thought to be suspended
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chromosome a threadlike strand of DNA in the cell nucleus that carries the genes in a linear order; "humans have 22 chromosome pairs plus two sex chromosomes"
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subthalamic nucleus an oval mass of grey matter located in the caudal part of the subthalamus; associated with the striate body
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| 2. |
nucleus - the positively charged dense center of an atom |
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center,
centre,
midpoint a position on a basketball team of the player who participates in the jump that starts the game
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atom (nontechnical usage) a tiny piece of anything
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nucleon a constituent (proton or neutron) of an atomic nucleus
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| 3. |
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 |
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center,
centre,
midpoint a position on a basketball team of the player who participates in the jump that starts the game
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comet (astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit
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astronomy,
uranology the branch of physics that studies celestial bodies and the universe as a whole
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| 4. |
nucleus - any histologically identifiable mass of neural cell bodies in the brain or spinal cord |
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neural structure a structure that is part of the nervous system
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dentate nucleus a large laminar nucleus of grey matter within the white matter of each cerebral hemisphere
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