GC: adj

S: http://www.rferl.org/content/explainer-why-polio-remains-endemic-afghanistan-pakistan-nigeria/24804097.html (last access: 22 April 2013); http://kids.britannica.com/comptons/dictionary?book=Dictionary&va=endemic (last access: 3 September 2014).

N: “particular to a people or locality,” 1650s (endemical), with -ic + Greek endemos “native, dwelling in (a place), of or belonging to a people,” from en “in” (see en- (2)) + demos “people, district” (see demotic). From 1660s as a noun.

S: OED – http://www.etymonline.com/index.php?allowed_in_frame=0&search=endemic&searchmode=none (last access: 3 September 2014)

SYN:
S:

CR: enzootic