en·dem·ic 
(ĕn-dĕmĭk)
(ĕn-dĕmĭk)adj.
1. Prevalent in a particular locality, region, or population: endemic diseases of the tropics.
2. Native only to a particular locality or region: endemic birds.
3. Common in or inherent to an enterprise or situation: "All the difficulties endemic to historical research become more acute in the case of war" (Constantine Pleshakov).
n.
1. An organism that is native only to a particular locality or region.
2. A disease that is prevalent in a particular locality, region, or population.
[From Greek endēmos, native, endemic : en-, in; see EN-2 + dēmos, people; see dā- in the Appendix of Indo-European roots.]
en·demi·cal·ly adv.
en·demism n.