The particle horizons in the universe are expanding.

The particle horizon is the maximum distance from which light could have reached the observer in the age of the universe.

Majorana particles are hypothesized particles that are their own antiparticles.

The Z particle is an elementary particle in the Standard Model of particle physics.

The Z particles are fundamental particles in particle physics.

Particle-board is commonly used in furniture construction.

I bought some particle-boards for my DIY project.

The nobiliary particles in their family names indicate their noble status.

Charged particles are found in various natural and man-made phenomena.

The delta particles are responsible for the transmission of the virus.