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
Synonyms for nucleus
Related Words for nucleusembryo, heart, center, hub, foundation, kernel, focus, germ, crux, matter, seed, principle, premise, pivot, spark, nub
Examples from the Web for nucleus
Contemporary Examples of nucleus
Deuterium is an isotope of hydrogen containing a proton and neutron in its nucleus, while normal hydrogen has only a proton.Are Comets the Origin of Earth’s Oceans?
Matthew R. Francis
December 14, 2014
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
To win you have to start winning and these very attractive candidates could help form a nucleus to rebuild the Party.The GOP’s Long, Hard Road in California
May 8, 2014
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
March 23, 2014
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
March 15, 2014
Historical Examples of nucleus
The nucleus is the most important part of the cell, and governs its life.The Sexual Question
The spores are globose or nearly so, with a large "nucleus" nearly filling the spore.
The whole plant is gelatinous, with the exception, occasionally, of the nucleus.
Let it be granted, however, that at first a nucleus of twelve hundred slaves is formed.On Revenues
This collection will doubtless form the nucleus of a larger museum.The Last Voyage
Lady (Annie Allnutt) Brassey
noun plural -clei (-klɪˌaɪ) or -cleuses
- the central point of a starch granule
- a rare name for nucellus
Word Origin 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.
n. pl. nu•cle•us•es
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.