Definitions of nucleus

  1. a part of the cell containing DNA and RNA and responsible for growth and reproduction
  2. a small group of indispensable persons or things; " five periodicals make up the core of their publishing program"
  3. ( 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
  4. any histologically identifiable mass of neural cell bodies in the brain or spinal cord
  5. the positively charged dense center of an atom
  6. The body or the head of a comet.
  7. An incipient ovule of soft cellular tissue.
  8. A whole seed, as contained within the seed coats.
  9. 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.
  10. The tip, or earliest part, of a univalve or bivalve shell.
  11. The central part around which additional growths are added, as of an operculum.
  12. A visceral mass, containing the stomach and other organs, in Tunicata and some mollusks.
  13. 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.
  14. The kernel; the central part about which matter collects; the small, central mass of life- containing substance, from which plants and animals grow.
  15. 1. differentiated mass of protoplasm, the excutive center of the functional activity of the cell. It consists, like the cytoplasm, of a network of un fluid substance ( caryolymph or nuclear hyalopalsm); along the course of the linin filaments are small masses or granules of a deeply stainable small masses or granules of a deeply stainable basophilic substance ( chromatin). The nucleus also contains one or more minute oxyphilic bodies ( nucleoli). 2. A mass of gray matter, composed of gagnlion cells, in any part of the brain or spinal cord. 3. Any substance, foreign body, mucus, crystal, etc., around which a urinary or other calculus is formed.
  16. The central mass round which matter gathers: ( astr.) the head of a comet:- pl. NUCLEI.
  17. Any central mass; head of a comet.
  18. A center of development; central mass, as of a comet; kernel.
  19. Central part of a body round which the rest accumulates; the body of a comet.
  20. Anything round which matter has accumulated; that which may form the solid foundation or basis, as the nucleus of an army; the solid centre of any nodule or rounded mass; the central fleshy part of an oval; the body of a comet.
  21. A complex spheroidal mass essential to the life of a cell.

Quotes of nucleus

  1. 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
  2. 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
  3. To demonstrate this simultaneity is by no means trivial, because it may for example happen that the product nucleus always forms in an activated state at first. – Walther Bothe
  4. 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
  5. 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
  6. The family is the nucleus of civilization. – Will Durant
  7. 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
  8. There's always room for improvement. We have a nucleus that's pretty good. You want players that will help. – Jason Kidd
  9. 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
  10. 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
  11. 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

Usage examples for nucleus

  1. The vigor of mind and body- our learned youth on one hand and strong- armed peasantry on the other- form the nucleus of our force. – The Complete Historical Romances of Georg Ebers by Georg Ebers
  2. It was my own; I had earned it with my own hand; and it seemed to my delighted fancy to form the nucleus out of which a future independence for my family might arise. – Roughing it in the Bush by Susanna Moodie
  3. I confess, then, that the figure of Pepita was, as it were, the center, or rather the nucleus and focus of these idle fancies. – Pepita Ximenez by Juan Valera
  4. The Home is the crystal of society- the nucleus of national character; and from that source, be it pure or tainted, issue the habits, principles and maxims, which govern public as well as private life. – Self Help by Samuel Smiles
  5. It thus seems a reasonable hypothesis that the nucleus of the Banjara caste was constituted by the Charans or bards of Rajputana. – The Tribes and Castes of the Central Provinces of India Volume II by R. V. Russell
  6. They formed a nucleus which gave the school a firm position. – Pictures of German Life in the XVIIIth and XIXth Centuries, Vol. II. by Gustav Freytag
  7. If we then remove the shell itself, we find within a solid nucleus of clay, having the form of the interior of the shell. – The Student's Elements of Geology by Sir Charles Lyell
  8. Taylor, who was forming a line about a quarter of a mile in the rear of where we had been fighting, and found a small patch of the Second Regiment, which was the nucleus around which that Regiment was rallying, and gave the colors to them. – Notes of a staff officer of our First New Jersey Brigade on the Seven Day's Battle on the peninsula in 1862 by E. Burd Grubb
  9. It had grown to a membership of 750. It still kept for its nucleus painters, writers, musicians and actors, amateur and professional. – Complete Story of the San Francisco Horror by Richard Linthicum Trumbull White Samuel Fallows
  10. The leading thought or idea can be taken as a nucleus and around it constructed the different parts of the paragraph. – How to Speak and Write Correctly by Joseph Devlin
  11. Yet they were but a nucleus while his supplies remained few and poor, and the organization of the army unsatisfactory. – The Siege of Boston by Allen French
  12. All Canada might be taken, with the aid of our French and Indian allies, had we but a nucleus of American soldiers, and sufficient means to forward the enterprise. – Donald McElroy, Scotch Irishman by Willie Walker Caldwell
  13. Now, we want to make more use of this, to make the Salvation Army the nucleus of a great agency for bringing comfort and counsel to those who are at their wits' end, feeling as if in the whole world there was no one to whom they could go. – In-Darkest-England-and-the-Way-Out by Booth, William
  14. He had a small nucleus that could be relied upon to stay; but most of his force was composed of men who came from all parts of the colonies to serve three weeks, three months or six months then return home and have others come in their places. – The American Revolution and the Boer War, An Open Letter to Mr. Charles Francis Adams on His Pamphlet "The Confederacy and the Transvaal" by Sydney G. Fisher
  15. Mechanism and finalism agree in taking account only of the bright nucleus shining in the centre. – Creative Evolution by Henri Bergson
  16. They stand on the site of the earliest nucleus of the present city, and it is in this neighbourhood that one gets most in touch with the Rouen that has so nearly vanished. – Normandy, Complete The Scenery & Romance Of Its Ancient Towns by Gordon Home
  17. The nucleus of a branch exhibition was forming itself in Welbeck Street. – The Crime Doctor by Ernest William Hornung
  18. In their bargains with the Indians they acquired immense tracts of land in the Northern part of the State of New York, which were the nucleus of their large fortunes. – Eighty Years And More; Reminiscences 1815-1897 by Elizabeth Cady Stanton
  19. Maybe he thinks it's easy to be a nucleus – Pee-Wee Harris Adrift by Percy Keese Fitzhugh
  20. This was the nucleus of the fine collection which since 1812 has been included in the Palace of the Doges. – Italy, the Magic Land by Lilian Whiting