a French overseas region and department 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 Guiana in American English
French overseas department in NE South America, on the Atlantic: 35,135 sq mi (90,999 sq km); pop. 115,000; cap. Cayenne