Definitions of endemic:

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

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

  Example: "Diseases endemic to the tropics"

• adjective:   native to or confined to a certain region

  Example: "The islands have a number of interesting endemic species"

• adjective:   originating where it is found

  Example: "Endemic folkways"