(ō′kə) noun
1. A weight used in Turkey, Egypt, Bulgaria, etc., equal to about 2.828 lbs.
2. A unit of capacity, equal to about one liter. [<Ital. oca, occa <Turkish ōqah <Arabic ūqivah <Gk. oungia an ounce <L uncia]

(o·kä′)
1. A river of the west central European Russian S.F.S.R., flowing 918 miles east to the Volga at Gorki.
2. A river in SW Buryat-Mongol S.S.R., flowing 500 miles north to the Angara.