nucleus

(Life processes and cells) the center of a cell where genetic information is usually stored.

nucleus

(Learning Modules / Biology / DNA / Glossary) The 'heart' of a cell, containing DNA, but also RNA and protein.

Nucleus

the central part of an atom that contains protons and neutrons. The nucleus is the heaviest part of the atom.
Found on http://www.encyclo.co.uk/local/21808

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.
Found on http://www.physicalgeography.net/physgeoglos/n.html

nucleus

(atomic) The center of an atom, containing both protons and (except for 1H) neutrons.
Found on http://www.ge-at.iastate.edu/glossary-of-geologic-terms/

nucleus

(biol): a ball of dense material bounded by a membrane and containing the chromosomes. Nuclei are found in the cells of all living organisms except viruses, and they are the controlling mechanisms of the cells.
Found on http://www.seafriends.org.nz/books/glossary.htm

nucleus

(from the article `astronomy`) The central region of the Milky Way Galaxy is so heavily obscured by dust that direct observation has become possible only with the development of ... At the very centre of the Galaxy lies a remarkable object—in all likelihood a massive black hole surrounded by an accretion disk of high-temperature .....
Found on http://www.britannica.com/eb/a-z/n/61

nucleus

(from the article `comet`) As previously noted, the traditional picture of a comet with a hazy head and a spectacular tail applies only to a transient phenomenon produced by ... Despite their name, many comets do not develop tails. Moreover, comets are not surrounded by nebulosity during most of their lifetime. The only ... In a fund...
Found on http://www.britannica.com/eb/a-z/n/61

nucleus

(from the article `nebula`) The central stars are known from their spectra to be very hot. A common type of spectrum has very broad emission lines of carbon or nitrogen, as well ... Most planetaries show a central star, called the nucleus, which provides the ultraviolet radiation required for ionizing the gas in the ring or shell ... ...
Found on http://www.britannica.com/eb/a-z/n/61

nucleus

(from the article `roads and highways`) ...of stones at least 2 inches in size, (2) the rudus, a 9-inch-thick layer of concrete made from stones under 2 inches in size, (3) the nucleus ...
Found on http://www.britannica.com/eb/a-z/n/61

nucleus

(noo´kle-әs) pl. nu´clei a spheroid body within a cell, enclosed within a double membrane called the nuclear envelope; the nucleus contains the chromosomes and one or more nucleoli. Its contents are collectively referred to as nucleoplasm. The chromosomes contain deoxyribonucleic acid (DNA), which is the genetic material...
Found on http://www.encyclo.co.uk/local/21001

nucleus

(noo;kle-us) A spheroid body within a cell that contains the genetic factors of the cell.
Found on http://www.mhhe.com/biosci/abio/glossary.mhtml

nucleus

[n] - (astronomy) the center of the head of a comet 2. [n] - the positively charged dense center of an atom 3. [n] - any histologically identifiable mass of neural cell bodies in the brain or spinal cord 4. [n] - a part of the cell containing DNA and RNA and responsible for growth and reproduction
Found on http://www.webdictionary.co.uk/definition.php?query=nucleus

Nucleus

• (n.) A whole seed, as contained within the seed coats. • (n.) The body or the head of a comet. • (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 cle...
Found on http://thinkexist.com/dictionary/meaning/nucleus/

nucleus

cell nucleus noun a part of the cell containing DNA and RNA and responsible for growth and reproduction
Found on http://wordnetweb.princeton.edu/perl/webwn?s=nucleus

nucleus

(atomic) The center of an atom, around which orbits a cloud of electrons. It consists of protons and neutrons bound together by the strong force. Under the right conditions, nuclei may undergo nuclear fission or fusion, with the release of large amounts of energy. The atomic n...
Found on http://www.daviddarling.info/encyclopedia/N/nucleusa.html

nucleus

(biology) Click images to enlargeIn biology, the central, membrane-enclosed part of a eukaryotic cell, containing threads of DNA. It is found in both plant and animal cells. During cell division the threads of DNA coil up to form chromosomes. The...
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0007879.html

nucleus

(cometary) Artist's impression of a comet's nucleus The central and relatively small part of a comet. It is often described as a 'dirty snowball' since it is made up of about 75 percent ices (including frozen water, ammonia and carbon dioxide) and about 25 percent d...
Found on http://www.daviddarling.info/encyclopedia/N/nucleuscom.html

nucleus

(physics) In physics, the positively-charged central part of an atom, which constitutes almost all its mass. Except for hydrogen nuclei, which have only one proton, nuclei are composed of both protons and neutrons. Surrounding the nucleus are electrons, of equal and opposite charge to that...
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0005072.html

Nucleus

[advocacy group] Nucleus was a British-European advocacy group, the forerunner to British Influence (sometimes The Centre for British Influence). Nucleus was based in London, with additional operations in Brussels. Founded in 2010, Nucleus promoted a `euro-realist` British approach to European political and business affairs. As well as regu...
Found on http://en.wikipedia.org/wiki/Nucleus_(advocacy_group)

Nucleus

[neuroanatomy] In neuroanatomy, a nucleus is a brain structure consisting of a relatively compact cluster of neurons. It is one of the two most common forms of nerve cell organization, the other being layered structures such as the cerebral cortex or cerebellar cortex. In anatomical sections, a nucleus shows up as a region of gray matter, o...
Found on http://en.wikipedia.org/wiki/Nucleus_(neuroanatomy)

Nucleus

[video game] Nucleus is a downloadable game on the PlayStation Store, also known as Bacterius on the Japanese PSN. ==Gameplay== Nucleus is a puzzle-based shooting game with a dual stick control system similar to Robotron: 2084. Players are tasked with ridding a host body of a virus infestation, moving through the body`s three main biologica...
Found on http://en.wikipedia.org/wiki/Nucleus_(video_game)

Nucleus

Nu'cle·us noun ; plural English Nucleuses , Latin Nuclei . [ Latin , a kernel, dim. from nux , nucis , nut. Confer Newel post.] 1. A kernel; hence, a central mass or point about which matter is gathered, or to which accretion is made; the central or ...
Found on http://www.encyclo.co.uk/webster/N/39

nucleus

1. Organelle containing the chromosomes
Found on http://www.quick-facts.co.uk/science/glossary.html

nucleus

1. Organelle containing the chromosomes. 2. That part of an atom containing the protons and neutrons
Found on http://www.fisicx.com/quickreference/science/glossary.html
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