Emunctorium

Part of speech: noun

Definitions

1. A place designated for cleansing or purifying, often used in a ceremonial or ritual context
2. An area specifically intended for rituals involving purification or removal of impurities
3. A facility or location associated with processes of spiritual or physical purification in various traditions

Etymology: Its core image is a blown nose. The Latin verb "emungere" combined "e-," meaning "out," with "mungere," "to wipe the nose," so its basic sense was clearing out mucus. "Mucus" is related to the same root. From that literal sense came a figurative one: anything that drained away waste or impurity. In medical writing, an emunctory is an organ that expels waste from the body, such as the kidneys, skin, or lungs. Your gloss, "place of purification," fits that sense of a drainage point, so the word stays tied to excretion rather than to cleansing in a broader sense.