An organism or disease that has been introduced to a region where it is not native and has become established there.
From ecdemic (introduced from outside) + '-ite' (suffix denoting a thing or agent). This ecological term names organisms that have spread beyond their original habitat.
Ecdemites are basically nature's refugees—organisms that found themselves in a new home, and some of them became wildly successful (like cane toads in Australia), while others just quietly established small populations that nobody notices.
Complete word intelligence in one call. Free tier — 50 lookups/day.