quarks

1. In physics , the elementary particles that make up the protons and neutrons that in turn make up the atomic nucleus . Quarks are the most basic known constituent of matter . ( See antimatter .)

Notes

No quarks have been seen in the laboratory because, according to current theory , they cannot exist as free particles.

Example Sentences

Perhaps no amount of heat can reduce quarks into smaller pieces, and quarks are the end of the road.

From The Daily Beast

In such extreme conditions scientists study quarks, the building blocks of matter.

From The Daily Beast