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Related to hypocaust: Caldarium
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.
[Latin hypocaustum, from Greek hupokauston, from hupokaiein, to light a fire beneath : hupo-, hypo- + kaiein, to burn.]
(Archaeology) an ancient Roman heating system in which hot air circulated under the floor and between double walls
[C17: from Latin hypocaustum, from Greek hupokauston room heated from below, from hupokaiein to light a fire beneath, from hypo- + kaiein to burn]
a hollow space or system of channels in the floor or walls of some ancient Roman buildings that provided a central heating system by distributing the heat from a furnace.
A space beneath the floor in an ancient Roman villa in which hot air from a fire or furnace was circulated to heat the house.