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hypocaust

noun
hy·​po·​caust | \ ˈhī-pə-ˌkȯst How to pronounce hypocaust (audio) \

Definition of hypocaust

: an ancient Roman central heating system with underground furnace and tile flues to distribute the heat

First Known Use of hypocaust

1678, in the meaning defined above

History and Etymology for hypocaust

Latin hypocaustum, from Greek hypokauston, from hypokaiein to light a fire under, from hypo- + kaiein to burn

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The first known use of hypocaust was in 1678

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