fun·gus-grow·ing ant 
(fŭnggəs-grō′ĭng)
(fŭnggəs-grō′ĭng)n.
Any of numerous ants of the tribe Attini of South America, Central America, and the southern United States that cultivate basidiomycetous fungi for food, and including the leaf-cutter ants. Also called attine ant.