In zoology and epidemiology, a term used to describe animals which are not domesticated, but which nevertheless live in close proximity to humans.
The text-book example of peridomesticity is the rat. Another good example is the (non-domesticated) pigeon.
Peridomesticity is an important concept in epidemiology, because peridomestic animals, like domestic animals, are potential carriers of infectious disease (e.g. bubonic plague).