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Definition of hypocaust


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hy·po·caust  audio  (hp-kôst) KEY 

NOUN:
A space under the floor of an ancient Roman building where heat from a furnace was accumulated to heat a room or a bath.

ETYMOLOGY:
Latin hypocaustum, from Greek hupokauston, from hupokaiein, to light a fire beneath : hupo-, hypo- + kaiein, to burn


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