[Osmanlis], name given to the Ottomans, from that of their founder, Osman or Othman.

[Osmose]. If two liquids be separated from each other only by a skin or parchment, each will percolate through the membrane and diffuse into the other; the process is known as osmose, and is constantly illustrated in the animal and vegetable world.

[Osnabrück] (35), a town in Hanover, 70 m. W. of Hanover, with a bishopric founded by Charlemagne, which was held by a brother of George I., and was secularised in 1803.

[Ossa], a mountain in Thessaly, famous in Greek mythology. See [Pelion].

[Ossian], the heroic poet of the Gaels, the son of Fingal and the king of Morven, said to have lived in the 3rd century, the theme of whose verse concerns the exploits of Fingal and his family, the translation of which he brought home from fairyland, to which he had been transported when he was a boy, and from which he returned when he was old and blind; James Macpherson, who was no Gaelic scholar, professed to have translated the legend, as published by him in 1760-62-63.

[Ostade, Adrian] and Isaac, two Dutch painters, brothers, born at Haarlem; Adrian (1610-1685), and Isaac (1617-1654).

[Ostend] (26), a favourite watering-place on the SW. coast of Belgium, 65 m. due W. of Antwerp; attracts 20,000 visitors every summer; it is an important seaport, having daily mail communication with Dover, and it manufactures linen and sail-cloth; fishing is the chief industry; it is famed for oysters, which are brought over from England and fattened for export.

[Ostia], the seaport of ancient Rome, at the mouth of the Tiber, now in ruins.

[Ostracism], banishment (lit. by shell) for a term of years by popular vote from Athens of any individual whose political influence seemed to threaten the liberty of the citizens; the vote was given by each citizen writing the name of the individual on a shell and depositing it in some place appointed, and it was only when supported by 6000 citizens that it took effect.

[Ostrogoths], or the Eastern Goths, a Teutonic people, who, having been induced to settle on the banks of the Danube, in the pay of the Roman emperor, invaded Italy, and founded in the end of the 5th century a kingdom under Theodoric, which fell before the arms of Justinian in 532.