Östersjön

== Swedish == === Etymology === Compound of öster (“eastern”) +‎ sjö (“sea”). From Old Norse Austrsjór. === Pronunciation === IPA(key): /²øsːtɛ(r)ˌɧøn/ === Proper noun === Östersjön c (definite form) Baltic Sea (a sea in Northern Europe, an arm of the Atlantic enclosed by Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia and Sweden) === Further reading === Östersjön in Svensk ordbok.