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Longman Dictionary of Contemporary English
antimatter
noun
EXAMPLES FROM CORPUS
▪ But the device can also accelerate antiprotons, the antimatter equivalents of protons with the same mass but negative electric charge.
▪ Earlier we talked about antimatter - particles which have all their physical characteristics opposite to those displayed by particles of matter.
▪ In the same way that matter is constituted of fundamental particles, antiparticles are the building blocks of antimatter.
▪ One argument is that the particles of matter and antimatter began bumping into each other and annihilating.
▪ Unfortunately, it seems extremely unlikely that predictable technology will be equipped to amass large quantities of antimatter.
The Collaborative International Dictionary
antimatter

antimatter \an`ti*mat"ter\ ([a^]n`t[i^]*m[a^]t"t[~e]r), n. (Physics) Matter whch is composed of antiparticles such as antiprotons, positrons, and antineutrons.

Douglas Harper's Etymology Dictionary
antimatter

also anti-matter, 1953, from anti- + matter (n.).

Wiktionary
antimatter

n. 1 (context physics English) matter that is composed of the antiparticles of those that constitute normal matter. 2 (context physics English) A form of matter that has a key property, such as charge, opposite to that of ordinary matter.

WordNet
antimatter

n. matter consisting of elementary particles that are the antiparticles of those making up normal matter

Wikipedia
Antimatter

In particle physics, antimatter is a material composed of antiparticles, which have the same mass as particles of ordinary matter but opposite charges, as well as other particle properties such as lepton and baryon numbers. Collisions between particles and antiparticles lead to the annihilation of both, giving rise to variable proportions of intense photons ( gamma rays), neutrinos, and less massive particle–antiparticle pairs. The total consequence of annihilation is a release of energy available for work, proportional to the total matter and antimatter mass, in accord with the mass–energy equivalence equation, .

Antiparticles bind with each other to form antimatter, just as ordinary particles bind to form normal matter. For example, a positron (the antiparticle of the electron) and an antiproton (the antiparticle of the proton) can form an antihydrogen atom. Physical principles indicate that complex antimatter atomic nuclei are possible, as well as anti-atoms corresponding to the known chemical elements. Studies of cosmic rays have identified both positrons and antiprotons, presumably produced by collisions between particles of ordinary matter. Satellite-based searches of cosmic rays for antideuteron and antihelium particles have yielded nothing.

There is considerable speculation as to why the observable universe is composed almost entirely of ordinary matter, as opposed to an even mixture of matter and antimatter. This asymmetry of matter and antimatter in the visible universe is one of the great unsolved problems in physics. The process by which this inequality between particles and antiparticles developed is called baryogenesis.

Antimatter in the form of anti-atoms is one of the most difficult materials to produce. Antimatter in the form of individual anti-particles, however, is commonly produced by particle accelerators and in some types of radioactive decay. The nuclei of antihelium (both helium-3 and helium-4) have been artificially produced with difficulty. These are the most complex anti-nuclei so far observed.

Antimatter (album)

Antimatter is the 1993 debut album of UK industrial band Cubanate. Notable among the tracks are "Body Burn" which is one of the band's most popular singles, and "Autonomy", which was featured in an instrumental version in the video game Gran Turismo alongside 3 tracks from Cubanate's Cyberia album.

Two versions of "Antimatter" were released. The original UK release was combined with tracks from the 1994 UK "Metal" EP, whilst some tracks from the original were dropped to create the 1995 U.S. version.

Antimatter (Star Trek novel)
Antimatter (band)

Antimatter, a UK melancholic rock band, is the project of longtime member Mick Moss. The project was formed in 1997 by Duncan Patterson (former bassist/songwriter of Anathema) and Moss. The pair released three albums together - Saviour, Lights Out and Planetary Confinement. Shortly after the completion of Planetary Confinement, Patterson left to start another band called Íon. Moss continued and released the project’s fourth album, Leaving Eden, following with 2009’s Live@An Club, released on his own label Music In Stone. Most recently Moss has overseen a 10-year retrospective multi-disc release entitled ‘Alternative Matter’, and released the 5th Antimatter album, 'Fear Of A Unique Identity', in 2012.

The earlier Antimatter albums, Saviour and Lights Out, focused on melodic vocal lines (often by guest female vocalists), dark electronica and balanced on the borderline between gothic and trip hop. Planetary Confinement marked the start of a shift towards more of an acoustic based melancholic rock sound. Leaving Eden, with Mick Moss as the only songwriter and singer, continues in this direction and also gives electric guitars a more prominent role. The result is a heavier sounding album, with little trace of the ambient sound of early Antimatter. Recent album Fear Of A Unique Identity presents a more layered, energetic picture, mixing all of Antimatter's past textures with a New Wave feel.

Antimatter (disambiguation)

Antimatter is material composed of antiparticles in the same way normal matter is composed of particles.

Antimatter may also refer to:

  • Antimatter (band), a Ambient/Trip hop/Gothic rock band
  • Antimatter (album), a Cubanate album
  • Antimatter (Star Trek novel), a Star Trek: Deep Space Nine novel written by John Vornholt
  • "Antimatter", a song by Swedish metal band Dragonland from the album Astronomy
  • "Anti-Matter", a song by American band The Aquabats from the album The Aquabats vs. the Floating Eye of Death!
  • Anti-Matter, a 1996 compilation album featuring 108

Usage examples of "antimatter".

Warchild 2 The Siege g8 Antimatter 3 Bloodletter 9 Proud Helios Star Trek: Voyager 1 Caretaker POCKET BOOKS The sale of this book without its cover is unauthorized.

He passed up through the engine-core space, past endless kilometers of fuel cells, the horizonless geometry of antimatter globes of frozen metallic hydrogen, and past the ring on ring and bastion on bastion of thought-boxes and ship-brains englobing the living quarters.

Parma was defeated with the use of antimatter weapons, its remaining industrial stations being confiscated in reparation, and Jerez became a principality awarded to Cheloe herself.

The Phoenix Exultant carried factories for the nucleogenesis of antimatter, in volume and output as large as any dozen of the antimatter-production facilities orbiting near Mercury Equilateral.

Finally, last month, Omuta had used an antimatter bomb against an industrial asteroid settlement in the Garissa system.

Garissa genocide, when Omuta launched a series of antimatter planetbusters at Garissa.

In addition to the usual system of Diracs for the production of the force field, the Cyclops was equipped with an antimatter projectile cannon, which enabled it to shoot off antiprotons simultaneously in any and all directions.

HVM shot and a one-legged support troop, wearing a bulbous suit of armor that made him look like the Michelin Man, were crawling along a shallow trench from position to position, feeding power to the suits from the surviving antimatter power packs.

Intellectual miracles like antimatter arrive in this world with no ethical instructions attached.

And he apparently got the specs for the Supergun so what he went and built was an antimatter cluster bomb .

But we thought it wise to assume it used the only fuel we knew of that made entry into transdimensional space possible: antimatter.

Meanwhile, the infidel battle-line was keeping scrupulously out of laser range and continuing the long-range capital missile duel in which their antimatter warheads nearly canceled out his own more numerous launchers.

The infidels were employing only nuclear warheads, without the antimatter explosions the defenders had dreaded.

But CERN has now broken ground on its new Antiproton Decelerator-an advanced antimatter production facility that promises to create antimatter in much larger quantities.

A photon drive, also, required the ship to be loaded with millions of tons of matter and antimatter as its annihilative fuel.