entresol

plural entresols

1. A mezzanine; an intermediate floor in a building, typically resembling a balcony; most often, the floor immediately above the ground floor and below a higher floor.

   This idea, however, was luckily all before him again from the moment he crossed the threshold of the little entresol of the Quartier Marbœuf into which she had gathered, as she said, picking them up in a thousand flights and funny little passionate pounces, the makings of a final nest.

   1903 September 28, Henry James, The Ambassadors, London: Methuen & Co. […], →OCLC

   1 more example

   The late lord in autumn filled Castlewood with company, who drank claret till midnight: the present man buries himself in a hut on a Scotch mountain, and passes November in two or three closets in an entresol at Paris, where his amusements are a dinner at a cafe and a box at a little theatre.

   1848 November – 1850 December, William Makepeace Thackeray, chapter 68, in The History of Pendennis. […], volume (please specify |volume=I or II), London: Bradbury and Evans, […], published 1849–1850, →OCLC