Origin of antimatter
Examples 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.
The distribution was unequal of course; antimatter could not exist in contact with ordinary matter.