matter

The physical substance that everything in the universe is made of, which has mass and occupies space.

Shared component: matter · physical substance

A form of matter composed of antiparticles, such as positrons and antiprotons, which have the same mass as ordinary particles but opposite electric charge and other quantum properties.

Shared component: matter · physical substance

A hypothetical form of matter that is thought to account for a large part of the total mass in the universe, but which does not emit or interact with electromagnetic radiation and is therefore invisible and detectable only through its gravitational effects.

Shared component: matter · physical substance