| 释义 |
karyon
karyon (ˈkærɪɒn) n (Biology) the nucleus of a cellThesaurus| Noun | 1. |  karyon - a part of the cell containing DNA and RNA and responsible for growth and reproductioncell nucleus, nucleuscell - (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 animalspronucleus - the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygotekaryoplasm, nucleoplasm - the protoplasm that constitutes the nucleus of a cellnucleole, nucleolus - a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesischromatin, chromatin granule - the readily stainable substance of a cell nucleus consisting of DNA and RNA and various proteins; during mitotic division it condenses into chromosomesachromatin - the part of a cell nucleus that is relatively uncolored by stains or dyeslinin - an obsolete term for the network of viscous material in the cell nucleus on which the chromatin granules were thought to be suspendedchromosome - 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"cell organ, cell organelle, organelle - a specialized part of a cell; analogous to an organ; "the first organelle to be identified was the nucleus"subthalamic nucleus - an oval mass of grey matter located in the caudal part of the subthalamus; associated with the striate body |
TranslationsEncyclopediaSeenucleuskaryon
nu·cle·us, pl. nu·cle·i (nū'klē-ŭs, nū'klē-ī), 1. In cytology, typically a rounded or oval mass of protoplasm within the cytoplasm of a plant or animal cell; it is surrounded by a nuclear envelope that encloses euchromatin, heterochromatin, and one or more nucleoli, and undergoes mitosis during cell division.
See also: virion. Synonym(s): karyon2. By extension, because of similar function, the genome of microorganisms (microbes), which is relatively simple in structure, lacks a nuclear envelope or membrane and does not undergo mitosis during replication.
See also: virion. Synonym(s): nucleoid (3) 3. In neuroanatomy, a group of nerve cell bodies in the brain or spinal cord that can be demarcated from neighboring groups on the basis of either differences in cell type or the presence of a surrounding zone of nerve fibers or cell-poor neuropil. 4. Any substance (for example, foreign body, mucus, crystal) around which a urinary or other calculus has formed. 5. The central portion of an atom (composed of protons and neutrons) where most mass and all the positive charge are concentrated. 6. A particle on which a crystal, droplet, or bubble forms. 7. A characteristic arrangement of atoms in a series of molecules; for example, the benzene nucleus is a series of aromatic compounds. [L. a little nut, the kernel, stone of fruits, the inside of a thing, dim. of nux, nut] nu·cle·us, pl. nucleuses (nū'klē-ŭs, -ĕz) 1. cytology Typically a rounded or oval mass of protoplasm within the cytoplasm of a plant or animal cell; it is surrounded by a nuclear envelope, which encloses euchromatin, heterochromatin, and one or more nucleoli and undergoes mitosis during cell division.
Synonym(s): karyon. 2. By extension, because of similar function, the genome of microorganisms (microbes), which is relatively simple in structure, lacks a nuclear membrane and does not undergo mitosis during replication.
Synonym(s): nucleoid (3) . 3. neuroanatomy a group of nerve cell bodies in the brain or spinal cord that can be demarcated from neighboring groups on the basis of either differences in cell type or the presence of a surrounding zone of nerve fibers or cell-poor neuropil. 4. Any substance (e.g., foreign body, mucus, crystal) around which a urinary or other calculus is formed. 5. The central portion of an atom (composed of protons and neutrons) where most of the mass and all of the positive charge are concentrated. 6. A particle on which a crystal, droplet, or bubble forms. 7. A characteristic arrangement of atoms in a series of molecules; e.g., the benzene nucleus in a series of aromatic compounds.
See also: virionkaryon
Synonyms for karyonnoun a part of the cell containing DNA and RNA and responsible for growth and reproductionSynonymsRelated Words- cell
- pronucleus
- karyoplasm
- nucleoplasm
- nucleole
- nucleolus
- chromatin
- chromatin granule
- achromatin
- linin
- chromosome
- cell organ
- cell organelle
- organelle
- subthalamic nucleus
|