Noun
(historical) A supporter of Spartacus, who led a slave rebellion against the ancient Roman Empire.
(historical) A member of the Spartacus League, a left-wing Marxist revolutionary movement in Germany during and just after World War I.
Synonym: Spartacide
A member of the modern Spartacist League, or International Communist League, a Trotskyist international organisation.
Source: en.wiktionary.org