antiatom

[ an-tee-at-uh m, an-tahy- ]
/ ˈæn tiˌæt əm, ˈæn taɪ- /

noun Physics.

an atom of antimatter.

Origin of antiatom

First recorded in 1965–70; anti- + atom

Words nearby antiatom

antianxiety drug, antiar, antiarrhythmic, antiart, antiarthritic, antiatom, antiauxin, antibacchius, antibacterial, antiballistic, antiballistic missile

British Dictionary definitions for anti-atom

anti-atom

noun

an atom composed of antiparticles, in which the nucleus contains antiprotons with orbiting positrons

Scientific definitions for anti-atom

antiatom
[ ăn′tē-ăt′əm, ăn′tī- ]

An atom composed of antiparticles. An antiatom consists of positrons, antiprotons, and antineutrons. It has the same mass and spin as an ordinary atom, and the same amount of charge and magnetic moment, but the charge and magnetic moment are the opposite of those of an ordinary atom.