caldarium.
In Roman baths, the hottest room, with a plunge-pool. It preceded the tepidarium and frigidarium.
Meaning & usage
In Roman baths, the hottest room, with a plunge-pool. It preceded the tepidarium and frigidarium.
In modern spas, a room with a hot floor.
An intermediate or warm greenhouse.
Where this word comes from
Unadapted borrowing from Latin caldārium (“room containing warm water for bathing”), substantive of caldārius (“of, pertaining to or suitable for bathing”), from caldus (“warm, hot”) + -ārius, alternative form of calidus, from caleō (“to be warm or hot; glow”).
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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.