hypocaust.
An underfloor space or flue through which heat from a furnace passes to heat the floor of a room or a bath.
Meaning & usage
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.
Where this word comes from
From Latin hypocaustum, from Ancient Greek ὑπόκαυστον (hupókauston), from Ancient Greek ὑπό (hupó, “underneath”) + καυστόν (kaustón, “burnt offering”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.