Guiana

geographical name

Gui·​a·​na gē-ˈa-nə 

-ˈä-nə;

gī-ˈa-nə

region of northern South America bordering on the Atlantic and bounded on the west and south by the Orinoco, Negro, and Amazon rivers; includes Guyana, French Guiana, and Suriname also collectively known as the Guianas , and adjoining parts of Brazil and Venezuela

Guianan

gē-ˈa-nən 

adjective or noun

Guianese

ˌgī-ə-ˈnēz 

ˌgē-ə-

-ˈnēs

adjective or noun