Definition of "penetralium" []

• The innermost (or most secret) part of a building; an inner sanctum (noun)

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• "I would have made a few comments, and requested a short history of the place from the surly owner; but his attitude at the door appeared to demand my speedy entrance, or complete departure, and I had no desire to aggravate his impatience previous to inspecting the penetralium."
• "He adds that he would kiss with rage and transport whatever had come in close contact with the woman he adored, and on one occasion eagerly pressed his lips to her cast-off underlinen, _vela secretiora penetralium_."
• "I would have made a few comments, and requested a short history of the place from the surly owner; but his attitude at the door appeared to demand my speedy entrance or complete departure, and I had no desire to aggravate his impatience previous to inspecting the penetralium."