A hypothetical celestial object, intermediate in density between a neutron star and a black hole, whose matter is in the form of quarks unconfined within nucleons.
Origin
1960s.
Definition of quark star in US English:
quark star
noun
Astronomy
A hypothetical celestial object, intermediate in density between a neutron star and a black hole, whose matter is in the form of quarks unconfined within nucleons.