The word for today is…
enclave (noun):
: a distinct territorial, cultural, or social unit enclosed within or as if within foreign territory
Source : Merriam -Webster
Etymology : Looking for the keys to the etymology of enclave? You’ll find them in French and Latin. English speakers borrowed “enclave” from French in the 19th century. The French noun derives in turn from the Middle French verb enclaver, meaning to “enclose.” “Enclaver” itself can be traced to the Latin prefix in- and the Latin noun clavis, meaning “key.” “Clavis” opened the door to a few other English words, some of which might seem unlikely relatives of “enclave.” “Clavicle,” the word for the bone that joins the breastbone and the shoulder blade, comes from “clavis,” as does the musical sign “clef
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