01 n. A furnace, esp. one connected with a series of small chambers and flues of tiles or other masonry through which the heat of a fire was dist…
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A furnace, esp. one connected with a series of small chambers and flues of tiles or other masonry through which the heat of a fire was distributed to rooms above. This contrivance, first used in bath, was afterwards adopted in private houses.(Anc. Arch.)