a space below the floor in some ancient Roman buildings, into which hot air was piped to warm the rooms
Origin of hypocaustClassical Latin hypocaustum from Classical Greek hypokauston from hypokaiein, to heat by applying fire below from hypo- (see hypo-) + kaiein, to burn
A space under the floor of an ancient Roman building through which flue gases from a furnace were passed to heat a room or a bath.
Origin of hypocaustLatin hypocaustum from Greek hupokauston from hupokaiein to light a fire beneath hupo- hypo- kaiein to burn
- An underfloor space or flue through which heat from a furnace passes to heat the floor of a room or a bath.
- An underfloor heating system, even without such an underfloor space or flue, as adapted for modern housing.
Latin hypocaustum, from Ancient Greek ὑπό (hupo, “underneath”) + καίειν (kaiein, “to light a fire, burn”)