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Antimatter

//ˈæn.tiˌmæt.ɚ// noun

Definitions

Noun
  1. 1
    Matter that is composed of the antiparticles of those that constitute normal matter. uncountable, usually

    "But most theories predict that equal amounts of matter and antimatter should have been produced during the big bang, and the mystery of what happened to all the antimatter is a central question in fundamental physics."

  2. 2
    matter consisting of elementary particles that are the antiparticles of those making up normal substances wordnet
  3. 3
    A form of matter that has a key property, such as charge, opposite to that of ordinary matter. uncountable, usually

    "Particles of matter and antimatter are identical, except for an opposite electrical charge. An electron has a negative charge whereas its antiparticle, the positron, has a positive charge, and both have an identical mass."

Etymology

From anti- + matter. Coined by British physicist Arthur Schuster in 1898 to describe matter that resists gravity in a jocular article in Nature titled "Potential Matter.—A Holiday Dream", but not used in a modern sense until the 1940s.

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