1875, The British and Foreign Medico‐Chirurgical Review, J. & A. Churchill; Volume LVI., page #338:
The mode of observing the amœboid movements of the leucocytes in the blood of homœothermic and pœcilothermic animals respectively is fully described, as also the effect of gases, liquid reagents, electricity, heat, and moisture, on both red and colourless elements.
1898, Wilhelm Pfeffer, quoted in Proceedings of the Royal Society of London, Harrison and Sons; Volume LXIII., page #96:
The functional metabolism, in fact, as in pœcilothermic organisms, does not provide for the regulative maintenance of a definite body‐temperature.
1921, Edward Mason Parker and Scott Dudley Breckinridge, Surgical and Gynæcological Nursing, J. B. Lippincott Company; second edition, Part IV., Chapter XV, page #203:
Warm‐blooded animals are therefore called homœothermic, that is, with unvarying heat ; while cold‐blooded animals are pœcilothermic, that is, with changing heat.
