sb. (adj.). [After Karmat, the founder of the sect.] One of a sect of Mohammedans, founded in the 9th cent. Also as adj. Belonging to this sect.
1819. Pantologia, Karmatians, a sect of Mohammedans, who once occasioned great disorders in the empire of the Arabs.
1875. Encycl. Brit., II. 259/2. As to the special tenets professed by the Karmathians they were, in their ultimate expression, pantheistic in theory and socialist in practice. Ibid. (1883), XVI. 594/1. Towards 887 A.D. an Ismailian, Hamdán, surnamed Ḳarmaṭ, founded the branch sect of the Carmathians.