antimatter

[ an-tee-mat-er, an-tahy- ]
/ ˈæn tiˌmæt ər, ˈæn taɪ- /

noun Physics.

matter composed only of antiparticles, especially antiprotons, antineutrons, and positrons.

Origin of antimatter

First recorded in 1950–55; anti- + matter

Example sentences from the Web for antimatter

  • Instead, dark matter is its own antimatter, so any pair of particles that meet will destroy each other.

    Still No Dark Matter from Space Station Experiment |Matthew R. Francis |September 21, 2014 |DAILY BEAST
  • On the average, one atom out of every ten million in the universe was an atom of antimatter.

    Psichopath |Gordon Randall Garrett
  • The distribution was unequal of course; antimatter could not exist in contact with ordinary matter.

    Psichopath |Gordon Randall Garrett

British Dictionary definitions for antimatter

antimatter
/ (ˈæntɪˌmætə) /

noun

a form of matter composed of antiparticles, such as antihydrogen, consisting of antiprotons and positrons

Scientific definitions for antimatter

antimatter
[ ăntĭ-măt′ər ]

A form of matter that consists of antiparticles.

Cultural definitions for antimatter

antimatter

In physics, matter made of antiparticles.