endemic

Short definition from Wiktionary

Adjective

1. 1
   Native to a particular area or culture; originating where it occurs.
2. 2
   Peculiar to a particular area or region; not found in other places.
3. 3
   Prevalent in a particular area or region, persistent within a population.

Noun

1. 1
   An individual or species that is endemic to a region.
2. 2
   A disease affecting a number of people simultaneously, so as to show a distinct connection with certain localities.