Ottoman

1. Of or relating to the Ottoman Empire or its people, language, or culture.
2. Turkish.

[French, from Italian ottomano, from Arabic 'uṯmānī, of Uthman, from 'uṯmān, Osman I.]

A powerful Muslim clan that settled in what is now Turkey and established a Muslim dynasty that ruled from about the 13th century A.D. until 1924. It was the major preserver of "official" Islamic continuity in the Mediterranean and adjacent areas during most of that period.