Definition of Nucleus

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Nucleus

A kernel; hence, a central mass or point about which matter is gathered, or to which accretion is made; the central or material portion; -- used both literally and figuratively.

The body or the head of a comet.

An incipient ovule of soft cellular tissue.

A whole seed, as contained within the seed coats.

A body, usually spheroidal, in a cell or a protozoan, distinguished from the surrounding protoplasm by a difference in refrangibility and in behavior towards chemical reagents. It is more or less protoplasmic, and consists of a clear fluid (achromatin) through which extends a network of fibers (chromatin) in which may be suspended a second rounded body, the nucleolus (see Nucleoplasm). See Cell division, under Division.

The tip, or earliest part, of a univalve or bivalve shell.

The central part around which additional growths are added, as of an operculum.

A visceral mass, containing the stomach and other organs, in Tunicata and some mollusks.

Related Definitions:

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Nucleus Quotations

Plant the seed of desire in your mind and it forms a nucleus with power to attract to itself everything needed for its fulfillment.
Robert Collier

The family is the nucleus of civilization.
Will Durant

We had built up a team in Edmonton that really knew who each other was from a personal standpoint and from a professional standpoint. Our nucleus had stayed together for a long time.
Mark Messier

It is, I claim, nonsense to say that it does not matter which individual man acted as the nucleus for the change. It is precisely this that makes history unpredictable into the future.
Gregory Bateson

The most terrifying thing I can think of is being alone - and I mean utterly alone, like no one else in the world alone - at night. That's the nucleus of the first story in my collection and it's also where the title came from for the book.
Paul Kane

There is in us a lyric germ or nucleus which deserves respect; it bids a man to ponder or create; and in this dim corner of himself he can take refuge and find consolations which the society of his fellow creatures does not provide.
Norman Douglas

It seems to me, thinking of it, that there must be some universal plan which set in motion the orbiting of the electrons about the nucleus and the slower, more majestic orbit of the galaxies about one another to the very edge of space.
Clifford D. Simak

In particular, I established a reasonably accurate energy threshold for permanent displacement of a nucleus from its regular lattice position, substantially smaller than had been previously presumed.
Walter Kohn

In this case, the particle formed has correspondingly less energy, whereas the product nucleus passes into the ground state with emission of the quantity of energy saved as gamma radiation.
Walther Bothe

Instead of an attic with a few test tubes, bits of wire and odds and ends, the attack on the atomic nucleus has required the development and construction of great instruments on an engineering scale.
Ernest Lawrence

Nucleus Translations

nucleus in Afrikaans is pit
nucleus in Dutch is pit, kern
nucleus in Finnish is ydin
nucleus in French is noyau cellulaire, noyau
nucleus in German is Kern, Zellkern
nucleus in Italian is nucleare, nucleo cellulare

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