Antimatter

Material made from antifermions. We define the fermions that are common in our universe as matter and their antiparticles as antimatter. In the particle theory there is no a priori distinction between matter and antimatter. The asymmetry of the universe between these two classes of particles is a deep puzzle for which we are not yet completely sure of an explanation. ...

antimatter

[n] - matter consisting of elementary particles that are the antiparticles of those making up normal matter
Found on http://www.webdictionary.co.uk/definition.php?query=antimatter

Antimatter

Material made from antifermions. We define the fermions that are common in our universe as matter and their antiparticles as antimatter. In the particle theory there is no a priori distinction between matter and antimatter. The asymmetry of the universe between these two classes of particles is a deep puzzle for which we are not yet completely sure...
Found on http://www.diracdelta.co.uk/science/source/a/n/antimatter/source.html

antimatter

noun matter consisting of elementary particles that are the antiparticles of those making up normal matter
Found on http://wordnetweb.princeton.edu/perl/webwn?s=antimatter

antimatter

substance composed of subatomic particles that have the mass, electric charge, and magnetic moment of the electrons, protons, and neutrons of ... [2 related articles]
Found on http://www.britannica.com/eb/a-z/a/83

antimatter

Material with properties equivalent to those of matter but with subatomic particles' quantum properties reversed; for example, particles' charges are opposite. Antimatter happens to be rare in our universe. However, it is believed that in the Big Bang equal quantities of matter and antimatter were c...
Found on http://www.daviddarling.info/encyclopedia/A/antimatter.html

antimatter

antimatter: see antiparticle.
Found on http://www.infoplease.com/ce6/sci/A0910314.html

antimatter

In physics, form of matter in which most of the attributes (such as electrical charge, magnetic moment, and spin) of elementary particles are reversed. These antiparticles can be created in particle accelerators, such as those at CERN in Geneva, Switzerland, and at Fermilab in the USA. In 1996 physicists at CERN created the first atoms of antimatte...
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0016267.html

Antimatter

A material made from antiparticles. The particles that are common in our universe are defined as matter and their antiparticles as antimatter. In the particle theory there is almost no a priori distinction between matter and antimatter. Their interactions are almost identical. The asymmetry of the universe between these two cla...
Found on http://www2.slac.stanford.edu/vvc/glossary.html

Antimatter

Matter composed of the antiparticles ofnormal matter.
Found on http://hepwww.rl.ac.uk/public/phil/glossary.html

Antimatter

A material made from antiparticles. The particles that are common in our universe are defined as matter and their antiparticles as antimatter. In the particle theory there is almost no a priori distinction between matter and antimatter. Their interactions are almost identical. The asymmetry of the universe between these two cla...
Found on http://www2.slac.stanford.edu/vvc/glossary.html

antimatter

All particles of ordinary matter (electrons, protons, neutrons) have anti-matter partners that appear identical in all respects (e.g. mass, spin) except that they have the opposite electric charge. We believe that in the Big Bang equal quantities of matter and antimatter were created. The fact that the universe now contains matter and not anti-matt...
Found on http://www.interactions.org/cms/?pid=1002289

Antimatter

(antiparticle) Species of subatomic particles that have the same mass and spin as normal particles, however, they have opposite electrical charges from their normal matter counterparts. In the case of antineutrons they are opposite of neutrons in magnetic moment. Positrons, which are the counterpart to electrons, have a positive ...
Found on http://www.chemistry-dictionary.com/definition/antimatter+%28antiparticle%2

Antimatter

[disambiguation] Antimatter is composed of antiparticles in the same way normal matter is composed of particles. Antimatter may also refer to: ...
Found on http://en.wikipedia.org/wiki/Antimatter_(disambiguation)

Antimatter

In particle physics, antimatter is material composed of antiparticles, which have the same mass as particles of ordinary matter but have opposite charge and other particle properties such as lepton and baryon number. Encounters between particles and antiparticles lead to the annihilation of both, giving rise to varying proportions of high-energy p...
Found on http://en.wikipedia.org/wiki/Antimatter

Antimatter

Matter consisting of particles with charges opposite that of ordinary matter. In antimatter, protons have a negative charge while electrons have a positive charge.
Found on http://www.seasky.org/astronomy/astronomy-glossary.html
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