variants: or Karmatian \ kärˈmātēən \ or Karmathian or less commonly Carmathian \ -āthēən \
Definition of Qarmatian
: a member of a Muslim Shiʽite sect founded in the 9th century and flourishing during the middle ages as a communistic secret society that in time expanded to a small independent state on the Persian gulf from which its members raided neighboring lands
History and Etymology for Qarmatian
Hamdan Qarmat, 9th century Iraqi peasant who founded the sect + English -an