calori-, calor-, calo-, cal-, cale-

1. A very large pot that is used for boiling or cooking food over a fire.
2. A condition or situation of great distress or unrest which is felt to be like a boiling kettle or vat: The university was a cauldron of conflicting racial protests that students were presenting and which resulted in the resignation of the president.
3. Etymology: from Late Latin caldaria, from feminine of Latin caldarius, "suitable for warming"; from calidarium, "hot bath"; from calidus, "warm".

Relating to something that produces the sensation of heat when it is applied to a person's body: Christine's husband put a calefacient mustard plaster on the bruise she had on her leg.

During the Roman times, the process of using a pipe or canal to convey heat from a furnace to the various apartments of a house.