Animal heat

heat produced in a living animal by any of various metabolic activities.
Historical Examples

The cells also from the very beginning are the organs that make the animal heat necessary for life.
The Ethics of Medical Homicide and Mutilation Austin O’Malley

animal heat is thus produced; and not only animal heat, but animal motion.
Fragments of science, V. 1-2 John Tyndall

Age is another influence that modifies the generation of animal heat.
A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) Calvin Cutter

The animal heat from the bees renders it perfectly comfortable.
Mysteries of Bee-keeping Explained M. Quinby

If animal heat is produced by combustion, why does not the human body burn up like a coal or candle?
A Guide to the Scientific Knowledge of Things Familiar Ebenezer Cobham Brewer

These, and the animal heat of the inmates, made the hut intensely warm.
North-Pole Voyages Zachariah Atwell Mudge

As animal heat depends upon respired oxygen, it will vary according to the respiratory apparatus of the animal.
The World’s Greatest Books – Volume 15 – Science Various

Whenever there is free, full circulation of blood, there is animal heat.
The American Reformed Cattle Doctor George Dadd

If any animal heat is left in the bodies, they will spoil very quickly.
Ducks and Geese Harry M. Lamon

There were many other men already there, which was good; the animal heat of their bodies made the interior warmer.
Tramping on Life Harry Kemp