What does "fundamental particle" mean?

Any of the subatomic particles that does not consist of other, smaller particles; the gauge bosons, leptons and quarks.

What is a synonym for "fundamental particle"?

Common synonyms include: air, atom, basic particle, basic unit, building block, central.

noun

noun ·Uncommon ·Advanced level

Noun

1
Any of the subatomic particles that does not consist of other, smaller particles; the gauge bosons, leptons and quarks.
2
(physics) a particle that is less complex than an atom; regarded as constituents of all matter wordnet