A medical agent or substance which produces a feeling of warmth when applied to the body.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "calefacient" in a sentence
"The animal experimented upon to be supplied daily with a weighed quantity of food, the composition and calefacient value of which had been accurately determined."
"The gases, vapors, and liquid and solid egesta thrown off from its body to be collected, analysed, and the calefacient [15] value of the combustible portion of them to be determined."
"These figures show the relative calefacient, or heat-producing powers of the different foods named _outside_ the body; but there is some doubt as to their having the same relative values when burned _within_ the body."