noun, plural nu·cle·i [noo-klee-ahy, nyoo-] /ˈnu kliˌaɪ, ˈnyu-/, nu·cle·us·es.
- the central, most prominent segment in a syllable, consisting of a vowel, diphthong, or vowellike consonant, as the a-sound in cat or the l-sound in bottled; peak.
- the most prominent syllable in an utterance or stress group; tonic syllable.
Origin of nucleus
Examples from the Web for nucleus
Deuterium is an isotope of hydrogen containing a proton and neutron in its nucleus, while normal hydrogen has only a proton.
A July 1884 New York Times article called her “the nucleus and center of the whole organization of crime in New York City.”Meet 'The Queen of Thieves' Marm Mandelbaum, New York City's First Mob Boss|J. North Conway|September 7, 2014|DAILY BEAST
To win you have to start winning and these very attractive candidates could help form a nucleus to rebuild the Party.
The Russian people should form the state at the center, “a nucleus around which other peoples are gathered.”Putin’s Dream of Empire Doesn’t Stop at Crimea, Or Even Ukraine|Oleg Shynkarenko|March 23, 2014|DAILY BEAST
To me, the nucleus of Peter Parker is him being left behind by his parents.Marc Webb Takes Us Inside ‘The Amazing Spider-Man 2’ and Discusses His Rise to the A-List|Marlow Stern|March 15, 2014|DAILY BEAST
"It is going to be what they call a nucleus," said Olive, showing a little piece of fancy work.The Captain's Toll-Gate|Frank R. Stockton
Toward the centre of the cell, especially if it has first been treated with iodine, the nucleus may be found.Elements of Structural and Systematic Botany|Douglas Houghton Campbell
He set out with the Cherethites and Pelethites, who were to form the nucleus of the army which he hoped to collect on the way.History of the Jews, Vol. I (of 6)|Heinrich Graetz
Their successors composed the nucleus of the party of Cushing, Everett, and Winthrop in 1860.Expansion and Conflict|William E. Dodd
The nucleus of a branch exhibition was forming itself in Welbeck Street.The Crime Doctor|Ernest William Hornung
British Dictionary definitions for nucleus
noun plural -clei (-klɪˌaɪ) or -cleuses
- the central point of a starch granule
- a rare name for nucellus
Word Origin for nucleus
Word Origin and History for nucleus
1704, "kernel of a nut," 1708, "head of a comet," from Latin nucleus "kernel," from nucula "little nut," diminutive of nux (genitive nucis) "nut," from PIE *kneu- "nut" (cf. Middle Irish cnu, Welsh cneuen, Middle Breton knoen "nut," Old Norse hnot, Old English hnutu "nut"). General sense of "central part or thing, about which others cluster" is from 1762. Use in reference to cells first recorded 1831. Modern atomic meaning is 1912, first by Ernest Rutherford, though theoretical use for "central point of an atom" is from 1844, in Faraday.
Medicine definitions for nucleus
n. pl. nu•cle•us•es
Science definitions for nucleus
Plural nuclei (nōō′klē-ī′)
- The solid central part of a comet, typically several kilometers in diameter and composed of ice, frozen gases, and embedded chunks of rock and dust. It is the permanent part of a comet from which the coma and tail are generated as the comet approaches the Sun. See more at comet.
- See galactic nucleus.
Culture definitions for nucleus (1 of 2)
plur. nuclei (nooh-klee-eye)
Culture definitions for nucleus (2 of 2)
In biology, the central region of the cell, in which DNA is stored. The nucleus usually appears as a dark spot in the interior of the cell. Primitive cells (such as bacteria and blue-green algae) have no nuclei.