per·ma·cul·ture 
(pûrmə-kŭl′chər)
(pûrmə-kŭl′chər)n.
A system of perennial agriculture emphasizing the use of renewable natural resources and the enrichment of local ecosystems.
[PERMA(NENT) + (AGRI)CULTURE.]
per′ma·cultur·ist, per′ma·cultur·al·ist n.