Afium Kara-Hissar (Black Castle of Opium, so called from its extensive trade in opium, which grows in its vicinity), or simply Kara-hissar, a city in the Turkish eyalet of Khu-davendikiar, in Asia Minor, capital of a sanjak or district, 50 m. S. S. E. of Kutaieh; pop. about 50,000. It is neatly built upon a mountain side, protected by a fortress, which is perched upon a high rock above it. Manufactories of carpets, felts, arms, stirrups, and saddlery are carried on by the inhabitants.