domiciliary

Domiciliary can be traced back through French domiciliaire and Medieval Latin domiciliarius to the earlier Latin word domicilium ("domicile"). "Domicilium" comes from the Latin domus ("home"), which is at the heart of a number of other English words, including "domestic" and "domicile." It is even the source of the English word dome. In Medieval Latin, "domus" came to mean "church," and was borrowed by French for the word dôme ("dome" or "cathedral") and by Italian for duomo ("cathedral"). In the 1500s, English drew on these words for "dome," a word which originally referred not to a vaulted roof or ceiling but to a mansion or a stately building.