antimatter
1. [ noun ] (physics) matter consisting of elementary particles that are the antiparticles of those making up normal matter
Related terms: substance antiparticle
Similar spelling:   anathematize
  anathematise
  Antionette
  anathema
  antimalarial
  antimagnetic
  antimacassar
  anti-american
  anatomist
  antiemetic
  anatomize
  anatomise