nucleus
n. kernel, central and most significant part of a whole; positively charged heart of an atom (Physics); core of a cell containing DNA and RNA (Biology); core of the head of a comet (Astronomy) | ||||
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Nucleus definition was found in categories: Language, Idioms & Slang(5) Science & Technology(8) Arts & Humanities(1) Law(1) Medicine(9) Society & Culture(1) Entertainment & Music(1) Computer & Internet(4) Religion & Spirituality(1) Encyclopedia(1)
Nucleus Definition from Language, Idioms & Slang Dictionaries & Glossaries
| Webster's Revised Unabridged Dictionary (1913) |
Nucleus
(n.)
The tip, or earliest part, of a univalve or bivalve shell.
(n.)
The central part around which additional growths are added, as of an operculum.
(n.)
The body or the head of a comet.
(n.)
An incipient ovule of soft cellular tissue.
(n.)
A whole seed, as contained within the seed coats.
(n.)
A visceral mass, containing the stomach and other organs, in Tunicata and some mollusks.
(n.)
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.
(n.)
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.
(n.)
The tip, or earliest part, of a univalve or bivalve shell.
(n.)
The central part around which additional growths are added, as of an operculum.
(n.)
The body or the head of a comet.
(n.)
An incipient ovule of soft cellular tissue.
(n.)
A whole seed, as contained within the seed coats.
(n.)
A visceral mass, containing the stomach and other organs, in Tunicata and some mollusks.
(n.)
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.
(n.)
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.
| WordNet 2.0 |
nucleus
Noun
1. a part of the cell containing DNA and RNA and responsible for growth and reproduction
(synonym) cell nucleus, karyon
(hypernym) organelle, cell organ
(hyponym) pronucleus
(part-holonym) cell
(substance-meronym) nucleoplasm, karyoplasm
(part-meronym) nucleolus, nucleole
(derivation) nucleate
2. the positively charged dense center of an atom
(hypernym) center, centre, midpoint
(part-holonym) atom
(part-meronym) nucleon
3. a small group of indispensable persons or things; "five periodicals make up the core of their publishing program"
(synonym) core, core group
(hypernym) set
(hyponym) cadre
4. (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
(hypernym) center, centre, midpoint
(part-holonym) comet
(classification) astronomy, uranology
5. any histologically identifiable mass of neural cell bodies in the brain or spinal cord
(hypernym) neural structure
(hyponym) dentate nucleus
Noun
1. a part of the cell containing DNA and RNA and responsible for growth and reproduction
(synonym) cell nucleus, karyon
(hypernym) organelle, cell organ
(hyponym) pronucleus
(part-holonym) cell
(substance-meronym) nucleoplasm, karyoplasm
(part-meronym) nucleolus, nucleole
(derivation) nucleate
2. the positively charged dense center of an atom
(hypernym) center, centre, midpoint
(part-holonym) atom
(part-meronym) nucleon
3. a small group of indispensable persons or things; "five periodicals make up the core of their publishing program"
(synonym) core, core group
(hypernym) set
(hyponym) cadre
4. (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
(hypernym) center, centre, midpoint
(part-holonym) comet
(classification) astronomy, uranology
5. any histologically identifiable mass of neural cell bodies in the brain or spinal cord
(hypernym) neural structure
(hyponym) dentate nucleus
| hEnglish - advanced version |
nucleus
nucleus
nullified adj : deprived of legal force [syn: invalidated]
similar words(5)
lenticular nucleus
cell nucleus
lentiform nucleus
parent nucleus
benzene nucleus
nucleus
nullified adj : deprived of legal force [syn: invalidated]
similar words(5)
lenticular nucleus
cell nucleus
lentiform nucleus
parent nucleus
benzene nucleus
| for Vocabulary Exams of KPDS, YDS,UDS (in Turkey); and SAT in America |
nucleus
A central point or part about which matter is aggregated.
A central point or part about which matter is aggregated.
| Concise English-Irish Dictionary v. 1.1 |
nucleus
núicléas
núicléas
Nucleus Definition from Science & Technology Dictionaries & Glossaries
| NRC Nuclear Energy Glossary |
Nucleus
The small, central, positively charged region of an atom. Except for the nucleus of ordinary hydrogen, which has only a proton, all atomic nuclei contain both protons and neutrons. The number of protons determines the total positive charge or atomic number. This number is the same for all the atomic nuclei of a given chemical element. The total number of neutrons and protons is called the mass number.
The small, central, positively charged region of an atom. Except for the nucleus of ordinary hydrogen, which has only a proton, all atomic nuclei contain both protons and neutrons. The number of protons determines the total positive charge or atomic number. This number is the same for all the atomic nuclei of a given chemical element. The total number of neutrons and protons is called the mass number.
| WEATHER&METEOROLOGY |
nucleus
A particle (of dust, salt) on which water molecules or ice accumulate forming raindrops, snow, hail, and so on. [See also cloud condensation nuclei.]
A particle (of dust, salt) on which water molecules or ice accumulate forming raindrops, snow, hail, and so on. [See also cloud condensation nuclei.]
| ASTRONOMY UNBOUND |
Atomic nucleus
. The tiny central region of an atom within which the bulk of it mass is contained. The nucleus is held together by the strong nuclear force and consists of the fundamental particles, protons and neutrons. See also element , isotope .
. The tiny central region of an atom within which the bulk of it mass is contained. The nucleus is held together by the strong nuclear force and consists of the fundamental particles, protons and neutrons. See also element , isotope .
| Glossary of Genetic Terms |
nucleus
defined: The central cell structure that houses the chromosomes.
explained: Listen to a detailed explanation.
Dr. Paul Meltzer, of the National Human Genome Research Institute's Laboratory of Cancer Genetics, defines nucleus.
illustrated: View illustration
related terms: chromosome, deoxyribonucleic acid (DNA)
defined: The central cell structure that houses the chromosomes.
explained: Listen to a detailed explanation.
Dr. Paul Meltzer, of the National Human Genome Research Institute's Laboratory of Cancer Genetics, defines nucleus.
illustrated: View illustration
related terms: chromosome, deoxyribonucleic acid (DNA)
| Electrochemistry Dictionary |
nucleus
See atomic structure.
See atomic structure.
| Physical Geography Terms and Meanings |
Nucleus
(1) Dense central portion of an atom that is composed of neutrons and protons. (2) Structure found in eukaryotic cells that contains the chromosomes.
(1) Dense central portion of an atom that is composed of neutrons and protons. (2) Structure found in eukaryotic cells that contains the chromosomes.
| Solar Physics Glossary |
Nucleus
The positively charged core of an atom, consisting of protons and neutrons (except for hydrogen), around which electrons orbit.
The positively charged core of an atom, consisting of protons and neutrons (except for hydrogen), around which electrons orbit.
| General Chemistry Glossary |
atomic nucleus (nucleus; nuclei; atomic nuclei)
Say it
A tiny, incredibly dense positively charged mass at the heart of the atom. The nucleus is composed of protons and neutrons (and other particles). It contains almost all of the mass of the atom but occupies only a tiny fraction of the atom's volume.
A tiny, incredibly dense positively charged mass at the heart of the atom. The nucleus is composed of protons and neutrons (and other particles). It contains almost all of the mass of the atom but occupies only a tiny fraction of the atom's volume.
Nucleus Definition from Arts & Humanities Dictionaries & Glossaries
| JM Latin-English Dictionary |
nucleus
N M
nucleus| inside of a nut| kernel; nut; central part; hard round mass/nodule
N M
nucleus| inside of a nut| kernel; nut; central part; hard round mass/nodule
Nucleus Definition from Law Dictionaries & Glossaries
| President's DNA Initiative Glossary |
Nucleus
The cellular organelle that contains most of the genetic material.
The cellular organelle that contains most of the genetic material.
Nucleus Definition from Medicine Dictionaries & Glossaries
| Dictionary of Medicine (Shahram) |
Nucleus
In cell biology, the structure that houses the chromosomes. In neuroanatomy, a group of nerve cells.
In cell biology, the structure that houses the chromosomes. In neuroanatomy, a group of nerve cells.
| Aids Glossary |
nucleus
central part of a cell which contains its genetic material.
central part of a cell which contains its genetic material.
| Hepatitis Central (TM) Liver Disease Medical Glossary |
Nucleus
Generally oval protoplasmic body in the center of the cell which contains the genetic material and is surrounded by a nuclear membrane; an essential organelle that controls growth, metabolism, and reproduction
Generally oval protoplasmic body in the center of the cell which contains the genetic material and is surrounded by a nuclear membrane; an essential organelle that controls growth, metabolism, and reproduction
| Macular Degeneration Glossary |
Nucleus
The central structure within the cell, which contains genetic material.
The central structure within the cell, which contains genetic material.
| Glossary of HIV/AIDS-Related Terms |
NUCLEUS
1. The central controlling body within a living cell, usually a spherical unit enclosed in a membrane and containing genetic codes for maintaining the life systems of the organism and for issuing commands for growth and reproduction. 2. The nucleus of a cell is essential to such cell functions as reproduction and protein synthesis. It is composed of nuclear sap and a nucleoprotein-rich network from which chromosomes and nucleoli<!-- (see) --> arise, and is enclosed in a definite membrane.
1. The central controlling body within a living cell, usually a spherical unit enclosed in a membrane and containing genetic codes for maintaining the life systems of the organism and for issuing commands for growth and reproduction. 2. The nucleus of a cell is essential to such cell functions as reproduction and protein synthesis. It is composed of nuclear sap and a nucleoprotein-rich network from which chromosomes and nucleoli<!-- (see) --> arise, and is enclosed in a definite membrane.
| CDC Radiological Terms |
Nucleus
the central part of an atom that contains protons and neutrons. The nucleus is the heaviest part of the atom.
the central part of an atom that contains protons and neutrons. The nucleus is the heaviest part of the atom.
| HIV Vaccine Glossary |
nucleus
the central controlling body within a living cell, usually a spherical unit enclosed in a membrane and containing genetic codes for maintaining life systems of the organism and for issuing commands for growth and reproduction.
the central controlling body within a living cell, usually a spherical unit enclosed in a membrane and containing genetic codes for maintaining life systems of the organism and for issuing commands for growth and reproduction.
| Terms and Definitions |
Nucleus
The cell structure that houses the chromosomes.
The cell structure that houses the chromosomes.
| Muscle Pain |
Nucleus
an aggregation of neuronal cell bodies within the central nervous system, tipically belonging to the same sensory or motor system.
an aggregation of neuronal cell bodies within the central nervous system, tipically belonging to the same sensory or motor system.
Nucleus Definition from Society & Culture Dictionaries & Glossaries
| Environmental Engineering (English ver.) |
Nucleus
The center of an atom, that contains protons and neutrons and carries a positive charge.
The center of an atom, that contains protons and neutrons and carries a positive charge.
Nucleus Definition from Entertainment & Music Dictionaries & Glossaries
| English to Federation-Standard Golic Vulcan |
Nucleus (atomic)
galu-svitan
galu-svitan
Nucleus (biology)
nala-svitan
Nucleus Definition from Computer & Internet Dictionaries & Glossaries
| ATM Forum |
Nucleus
The interior reference point of a logical node in the PNNI complex node representation.
The interior reference point of a logical node in the PNNI complex node representation.
| TCP/IP port numbers |
nucleus
1463/tcp Nucleus
1463/tcp Nucleus
| TCP/IP Ports Assignments |
1463/tcp
{nucleus}
Nucleus.
{nucleus}
Nucleus.
1463/udp
{nucleus}
Nucleus.
| TCP/IP Ports Assignments (Intrusive) |
1463/tcp
{nucleus}
Nucleus.
{nucleus}
Nucleus.
1463/udp
{nucleus}
Nucleus.
Nucleus Definition from Religion & Spirituality Dictionaries & Glossaries
| Webart Magic Astronomical Glossary |
Nucleus
The positively charged core of an atom, consisting of protons and neutrons (except for hydrogen), around which electrons orbit.
The positively charged core of an atom, consisting of protons and neutrons (except for hydrogen), around which electrons orbit.
Nucleus Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Nucleus
Nucleus may refer to:
In physics:
In physics:
- Atomic nucleus, the collection of protons and neutrons in the center of an atom, also composed of subatomic matter
- Ice nucleus, the center of an ice crystal
- Cloud condensation nuclei, the basis for the development of a cloud droplet
In biology:
- Cell nucleus, the control center of a cell, which contains the cell's chromosomal DNA
- Nucleus (neuroanatomy), a central nervous system structure composed mainly of gray matter
In astronomy:
- Comet nucleus, the solid core of a comet
- Galaxy nucleus, the central region of a galaxy
| See more at Wikipedia.org... |