from The Century Dictionary.
- Warming; heating.
- noun That which warms or heats; in medicine, a substance which excites a sensation of warmth in the part to which it is applied, as mustard, pepper, etc.; a superficial stimulant.
from the GNU version of the Collaborative International Dictionary of English.
- noun A substance that excites warmth in the parts to which it is applied, as mustard.
- adjective rare Making warm; heating.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective obsolete having
- noun obsolete A medical
agentor substancewhich produces a feeling of warmth when applied to the body.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adjective producing the sensation of heat when applied to the body
Sorry, no etymologies found.
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  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.
Ammianus Marcellinus, Hunni semicruda cujusvis Pecoris carne vescuntur, quasi inter femora sua & equorum terga subsertam, calefacient brevi.