Orminium
Ὀρμίνιον ορος
Orminium (Ὀρμίνιον ορος), a mountain in the north-eastern part of Bithynia, terminating in Cape Posidium (Ptol. 5.1. § § 10, 11). Ainsworth supposes it to be the same as the mountain now called Derne Jailafi.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.