NUCLEUS • DICTIONARY ONE.COM • Definition of Nucleus

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/nˈukliəs/ Listen

Nucleus

noun

(pl. E. nucleuses, L. nuclei)

A part of the cell containing DNA and RNA and responsible for growth and reproduction. Synonyms: cell nucleus, karyon.

The positively charged dense center of an atom.

A small group of indispensable persons or things. Synonyms: core, core group.

(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.

Any histologically identifiable mass of neural cell bodies in the brain or spinal cord.

The central structure of the lens that is surrounded by the cortex. Synonym: lens nucleus.

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Etymology of 'Nucleus'

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Revolutionary Proletarian Nucleus

subthalamic nucleus

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"Nucleus" Quotes from Famous Books

... whose real founder is said to have been the late Henry George, was formed in the '70s by newspaper writers and men working in the arts or interested in them. It had grown to a membership of 750. It still kept for its nucleus painters, writers, musicians and actors, amateur and professional. They were a gay group of men, and hospitality was their avocation. Yet the thing which set this club off from all others in the world was the midsummer ...

— The City That Was - A Requiem of Old San Francisco • Will Irwin

... increased knowledge in Geology during the present century, owing to the greater attention of philosophers to the situations of the different materials, which compose the strata of the earth, as well as to their chemical properties, it seems clearly to appear, that the nucleus of the globe beneath the ocean consisted of granite; and that on this the great beds of limestone were formed from the shells of marine animals during the innumerable primeval ages of the world; and that whatever strata lie on these beds of limestone, or on ...

— The Temple of Nature; or, the Origin of Society - A Poem, with Philosophical Notes • Erasmus Darwin

... of Mr. Van Buren that the English Abolitionists first began to propagate their doctrines in the Northern States, where the nucleus of an anti-slavery party was soon formed. This alarmed the Southerners, who, under the lead of Mr. Calhoun, threatened disunion if their "peculiar institution" was not let alone. The gifted South Carolinian having in January, 1838, paid a ...

— Perley's Reminiscences, Vol. 1-2 - of Sixty Years in the National Metropolis • Benjamin Perley Poore

... that I was too cowardly to come forward and take my share of this public notice, so I turned away to the inn and there awaited her coming. Indeed, she has seldom attempted to sketch without finding herself the nucleus of ...

— Passages From the French and Italian Notebooks, Complete • Nathaniel Hawthorne

... to that of putting off an evil day which some time must be endured—the atoms group themselves into molecules. In their turn the molecules go forth to war, capturing or being captured; the vibrations of the slaves always being forced to synchronise with those of their conquerors. The nucleus of the gas of a primal metal is now complete, and the foundation of a solar system—paltry molecule of the Universe as it is—is laid. Thereafter, the rest is easily followed. It is described in your school books, and must ...

— The Crack of Doom • Robert Cromie

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