nucleus

Noun
  1. A part of the cell containing DNA and RNA and responsible for growth and reproduction (synset 105442503)
    is a type of: cell organ, cell organelle, organelle - a specialized part of a cell; analogous to an organ
    subtypes:
    • pronucleus - the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote
    • subthalamic nucleus - an oval mass of grey matter located in the caudal part of the subthalamus; associated with the striate body
    has:
    • nucleole, nucleolus - a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis
    • 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
    • achromatin - the part of a cell nucleus that is relatively uncolored by stains or dyes
    • linin - an obsolete term for the network of viscous material in the cell nucleus on which the chromatin granules were thought to be suspended
    • chromosome - a threadlike strand of DNA in the cell nucleus that carries the genes in a linear order
    is a part of: 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
    substance holonym: karyoplasm, nucleoplasm - the protoplasm that constitutes the nucleus of a cell
    same as: cell nucleus, karyon
  2. The positively charged dense center of an atom (synset 109397997)
    is a type of: center, centre, midpoint - a point equidistant from the ends of a line or the extremities of a figure
    has: nucleon - a constituent (proton or neutron) of an atomic nucleus
    is a part of: atom - (physics and chemistry) the smallest component of an element having the chemical properties of the element
  3. A small group of indispensable persons or things (synset 108259144)
    "five periodicals make up the core of their publishing program"
    is a type of: set - a group of things of the same kind that belong together and are so used
    subtypes: cadre - a nucleus of military personnel capable of expansion
    same as: core, core group
  4. (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 (synset 109398135)
    referred to in: astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole
    is a type of: center, centre, midpoint - a point equidistant from the ends of a line or the extremities of a figure
    is a part of: comet - (astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit
  5. Any histologically identifiable mass of neural cell bodies in the brain or spinal cord (synset 105509583)
    is a type of: neural structure - a structure that is part of the nervous system
    subtypes: dentate nucleus - a large laminar nucleus of grey matter within the white matter of each cerebral hemisphere
  6. The central structure of the lens that is surrounded by the cortex (synset 105328312)
    is a type of: anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing and its construction and arrangement
    same as: lens nucleus

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