animal heat en · NOUN
Meanings
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(historical, uncountable) The heat generated in the body of a living animal.
[T]he work on animal heat, also strongly influenced by Priestley, led to the oxidation-respiration papers by Lavoisier and his collaborators, Laplace and Seguin.
2004, Robert E Schofield, The Enlightened Joseph Priestley, Pennsylvania State University, published 2004, page 130: