Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A small body in the nucleus of a cell that contains protein and RNA and is the site for the synthesis of ribosomal RNA and for the formation of ribosomal subunits.

from The Century Dictionary.

  • In zoology, the nucleus of a nucleus; one of the rounded deeply staining structures found in the nucleus of a cell.
  • Specifically, in Infusoria, a minute particle attached to the exterior of the nucleus (or “ovary”), supposed to function as a testicle.
  • In botany, a small solid rounded granule or particle in the interior of the nucleus. There may be several nucleoli in each nucleus.

from the GNU version of the Collaborative International Dictionary of English.

  • noun A little nucleus.
  • noun (Biol.) A small rounded body contained in the nucleus of a cell or a protozoan.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun cytology A conspicuous, rounded body within the nucleus of a cell.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin, from Latin, diminutive of nucleus, kernel; see nucleus.]

Examples

  • The nucleolus is plausible because people actually come to it, and to the Shapley value, without any knowledge of game theory: TVA asked how to allocate the benefits of its dam and came up with the Shapley value, a generalized version of the Aristotelean proportionality rule that is sensitive to concerns about team play.

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  • The other constituents of the ovum, viz., its limiting membrane and the denser spot contained in the nucleus, called the nucleolus, are not essential to the type cell, and in fact many cells exist without them.

    I. Embryology. 1. The Animal Cell

  • Schleiden, and accepted by Schwann, the connection between the three co-existent cell-constituents was long thought to be of this nature: that the nucleolus was the first to show itself in the development of tissues, by separating out of a formative fluid (blastema, cyto-blastema), that it quickly attained a certain size, that then fine granules were precipitated out of the blastema and settled around it, and that about these there condensed a membrane.

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  • This function of the nucleolinus, which is closely associated with a structure called the nucleolus, could clarify recent studies indicating an important role for the nucleolus in cell division.

    PhysOrg.com - latest science and technology news stories

  • This function of the nucleolinus, which is closely associated with a structure called the nucleolus, could clarify recent studies indicating an important role for the nucleolus in cell division.

    PhysOrg.com - latest science and technology news stories

  • Low doses of actinomycin D cause disruption of the nucleolus, which is a distinct compartment within the cell nucleus.

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  • The nucleolus is a multifunctional subnuclear compartment that is best known as the site where ribosome biogenesis takes place.

    PLoS ONE Alerts: New Articles

  • The nucleolus is a dark region of chromatin, in - volved in making ribosomes.

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  • Do the axioms for the Shapley value or the nucleolus appeal?

    Archive 2009-05-01

  • In turn, this led to a very considerable literature, encompassing related concepts such as the kernel (Davis and Maschler 1965) and nucleolus (Schmeidler 1969).

    Robert J. Aumann - Autobiography

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