nucleus

nucleus
noun (plural nuclei; also nucleuses) Etymology: New Latin, from Latin, kernel, from nuc-, nux nut — more at nut Date: 1704 1. a. the small bright body in the head of a comet b. the small brighter and denser portion of a galaxy 2. a central point, group, or mass about which gathering, concentration, or accretion takes place: as a. a cellular organelle of eukaryotes that is essential to cell functions (as reproduction and protein synthesis), is composed of nucleoplasm and a nucleoprotein-rich network from which chromosomes and nucleoli arise, and is enclosed in a definite membrane — see cell illustration b. a mass of gray matter or group of cell bodies of neurons in the central nervous system c. a characteristic and stable complex of atoms or groups in a molecule; especially ring <
the naphthalene nucleus
> d. the positively charged central portion of an atom that comprises nearly all of the atomic mass and that consists of protons and usually neutrons 3. the peak of sonority in the utterance of a syllable 4. a basic or essential part ; core <
players who are the nucleus of the team
>

New Collegiate Dictionary. 2001.

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  • nucléus — [ nykleys ] n. m. • 1864; « nucelle » 1846; du lat. nucleus ♦ Préhist. Noyau de silex ou autre roche dure, dont on extrait des éclats, des lames. ● nucléus ou nucleus nom masculin invariable Petit fragment, d origine biologique ou détritique, qui …   Encyclopédie Universelle

  • Nucleus — may refer to: Nucleus (atomic structure), the very dense region at the center of an atom Cell nucleus, the control center of a cell, which contains the cell s chromosomal DNA Nucleus (neuroanatomy), a cluster of neurons in the central nervous… …   Wikipedia

  • Nucleus — Datos generales Nacimiento 1969 Origen Gran Bretaña Muerte 1989 Infor …   Wikipedia Español

  • Nucleus — OS Разработчик Mentor Graphics Семейство ОС Операционная система реального времени Поддерживаемые платформы ARM Тип ядра Реального времени Лицензия Проприетарная …   Википедия

  • Nucleus — (lat. „Kern“), selten Nukleus, steht für Atomkern, den massetragenden Teil im Zentrum eines Atoms Nucleus (ZNS), eine Ansammlung von Zellkörpern im Zentralnervensystem Silbenkern, eine Gruppe von Lauten im natürlichen Sprechfluss Zellkern, ein… …   Deutsch Wikipedia

  • Nucleus — Nu cle*us, n.; pl. E. {Nucleuses}, L. {Nuclei}. [L., a kernel, dim. fr. nux, nucis, nut. Cf. {Newel} post.] [1913 Webster] 1. A kernel; hence, a central mass or point about which matter is gathered, or to which accretion is made; the central or… …   The Collaborative International Dictionary of English

  • nucleus — (n.) 1704, kernel of a nut, 1708, head of a comet, from L. nucleus kernel, from nucula little nut, dim. of nux (gen. nucis) nut, from PIE *kneu nut (Cf. M.Ir. cnu, Welsh cneuen, M.Bret. knoen nut, O.N …   Etymology dictionary

  • nucleus — [no͞o′klē əs, nyo͞o′klē əs] n. pl. nuclei [no͞o′klēī΄, nyo͞o′klēī΄] or nucleuses [ModL < L, a nut, kernel, for nuculeus, dim. < nux (gen. nucis), NUT] 1. a thing or part forming the center around which other things or parts are grouped or… …   English World dictionary

  • nucleus — nucleus. См. мужской пронуклеус. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • nucleus — nucleus. См. ядро. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Nucleus — Nucleus. См. Ядро. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

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