group of small islands of Fla. in the Gulf of Mexico, west of Key West
See Dry Tortugas in American Heritage Dictionary 4
(drī tôr-to͞oˈgəz)
An island group of southern Florida west of Key West. Famed for their marine life, the islands were named Tortugas (“turtles”) by the Spanish explorer Juan Ponce de León in 1513.