-t ə nə̇st, -tən- noun
( -s )
Usage: usually capitalized
Etymology: Medieval Latin satanista, from Late Latin Satan, Satanas + Latin -ista -ist
1.
a. archaic : one that is regarded as inherently evil
atheistical Satanists, or evil-seekers — Fraser's Magazine
b. : euchite
2. : an adherent of Satan or Satanism : diabolist
a Satanist … contemplating anatomical experiments out of his unique sadism — A.J.Guérard