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[kal-dair-ee-uh m] /kælˈdɛər i əm/
noun, plural caldaria
[kal-dair-ee-uh] /kælˈdɛər i ə/ (Show IPA)
(in an ancient Roman bath) a room having a hot bath.
Origin of caldarium
1745-55; < Latin: noun use of neuter of caldārius of warming, equivalent to cal(i)d(us) warm (cal(ēre) to be warm + -idus -id4) + -ārius -ary; see -ium, -arium Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for caldarium
Historical Examples
  • A doorway led from the tepidarium into the caldarium, or vapor-bath.

    Museum of Antiquity L. W. Yaggy
  • Doors led into the Laconicum from both the tepidarium and the caldarium.

  • The tepidarium, as well as the caldarium, had a hollow floor and walls.

  • The cold bath, in distinction from the caldarium, the hot bath.

  • Coming from these two sources the caldarium must have been, indeed, impure.

    De Re Metallica Georgius Agricola
  • See Note 16, p. 511, for discussion of yellow and caldarium copper.

    De Re Metallica Georgius Agricola
  • These differ, because the caldarium is only melted, and is brittle to the hammer; whereas the regulare is malleable or ductile.

    De Re Metallica Georgius Agricola
  • Exactly what material is meant by the term red (rubrum), yellow (fulvum) and caldarium copper is somewhat uncertain.

    De Re Metallica Georgius Agricola
  • Then he throws it into the tub containing hot water, for the caldarium copper is finer if quenched in hot water.

    De Re Metallica Georgius Agricola
  • The caldarium stood near by on one side, and the old natatio, or swimming room, joined it on the other.

British Dictionary definitions for caldarium


noun (pl) -daria (-ˈdɛərɪə)
(in ancient Rome) a room for taking hot baths
Word Origin
C18: from Latin, from calidus warm, from calēre to be warm
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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