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Webster 1913 Edition
Hypocaust
Hyp′o-caust
,Noun.
[L.
hypocaustum
, Gr. [GREEK]; [GREEK] under + [GREEK] to burn: cf. F. hypocauste
.] (Anc. Arch.)
A furnace, esp. one connected with a series of small chambers and flues of tiles or other masonry through which the heat of a fire was distributed to rooms above. This contrivance, first used in bath, was afterwards adopted in private houses.
Webster 1828 Edition
Hypocaust
HYP'OCAUST
,Noun.
1.
Among the Greeks and Romans, a subterraneous place where was a furnace to heat baths.2.
Among the moderns,the place where a fire is kept to warm a stove or a hot-house.Definition 2025
hypocaust
hypocaust
English
Hypocaust from the Roman Baths at Bath, England. The floor has been removed to reveal the pillars of the hypocaust.

Underfloor heating pipes, before they are covered by the screed.
Noun
hypocaust (plural hypocausts)
- 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.
Synonyms
- (underfloor flue): hippocaust
- (heating system): floor heating, underfloor heating
Translations
underground heating system for a bath
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See also
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hypocaust on Wikipedia.Wikipedia
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Underfloor heating on Wikipedia.Wikipedia