capable of producing the desired effect, late 14c., making, producing immediate effect, from Old French efficient and directly from Latin efficientem (nominative efficiens) effective, efficient, producing, active, present participle of efficere work out, accomplish (see effect).
Marco Island, Florida. Marco Island is a city in Collier County, Florida, United States, located on an island by the same name in the Gulf of Mexico off the coast of Southwest Florida. It is a principal city of the NaplesâMarco Island Metropolitan Statistical Area. The population was 16,413 at the 2010 census.
Black Hammock Island and the city of Jacksonville are located in Duval County, Florida. The population of the county is 864,263; Jacksonville is the county seat. Duval County is named after William Pope DuVal, former Governor of the Florida Territory. Duval County is bordered by Nassau County to the north, St. Johns County to the southeast, Clay County to the southwest and Baker County to the west.