In science, antimatter is a form of matter whose particles have characteristics and properties opposite to those of ordinary matter.
[technical]
antimatter in British English
(ˈæntɪˌmætə)
noun
a form of matter composed of antiparticles, such as antihydrogen, consisting of antiprotons and positrons
antimatter in American English
(ˈæntɪˌmætər; ˈæntaɪˌmætər; ˈæntiˌmætər)
noun
a form of matter in which the electrical charge or other property of each constituent particle is the reverse of that in the usual matter of our universe: an atom of antimatter has a nucleus of antiprotons and antineutrons surrounded by positrons
Examples of 'antimatter' in a sentence
antimatter
They have bored through the shields and placed antimatter charges.