Source : Webster's Revised Unabridged Dictionary (1913)

Endemic \En*de"mic\, Endemical \En*de"mic*al\, a. [Gr. ?, ?; ? +
   ? the people: cf. F. end['e]mique.] (Med.)
   Peculiar to a district or particular locality, or class of
   persons; as, an endemic disease.

   Note: An endemic disease is one which is constantly present
         to a greater or less degree in any place, as
         distinguished from an epidemic disease, which prevails
         widely at some one time, or periodically, and from a
         sporadic disease, of which a few instances occur now
         and then.

Source : WordNet®

endemical
     adj : 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"; "endemic malaria"; "food shortages and
           starvation are endemic in certain parts of the world"
           [syn: {endemic}] [ant: {epidemic}, {ecdemic}]