Definition of "Endemic" :

noun: a plant that is native to a certain limited area

"It is an endemic found only this island."

noun: a disease that is constantly present to a greater or lesser degree in people of a certain class or in people living in a particular location

adjective: originating where it is found

"Endemic folkways."

adjective: native to or confined to a certain region

"The islands have a number of interesting endemic species."

adjective: of or relating to a disease (or anything resembling a disease) constantly present to greater or lesser extent in a particular locality

"Diseases endemic to the tropics."