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A French overseas department of northeast South America on the Atlantic Ocean. French settlement began in 1604, but the area was largely ignored until penal colonies (now closed) were established in the 1800s. Cayenne is the capital and the largest city.
(Placename) a French overseas region in NE South America, on the Atlantic: colonized by the French in about 1637; tropical forests. Capital: Cayenne. Pop: 229 000 (2009 est). Area: about 91 000 sq km (23 000 sq miles)
French′ Gui•an′a(giˈæn ə, -ˈɑ nə)
an overseas department of France, on the NE coast of South America: formerly a French colony. 73,012; 35,135 sq. mi. (91,000 sq. km). Cap.: Cayenne.
French′ Guianese′, French′ Guian′an, adj., n.