central american country: any one of the countries occupying Central America; these countries (except for Belize and Costa Rica) are characterized by low per capita income and unstable governments
north american country: any country on the North American continent
fluorescein: a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)