Definitions

1. noun

A subatomic particle that has the same mass as another particle but opposite electric charge, or has the same type of spin as the antiparticle.

“The discovery of the antiparticle of the electron confirmed the predictions of quantum mechanics.”

2. noun

A particle that has the same properties as another but opposite in a specific way, such as having opposite spin.

“Researchers studied the properties of antiparticles to better understand the fundamental laws of physics.”