poikilothermian.
/ˌpɔɪkɪlə(ʊ)ˈθəːmɪə/, U.S. /pɔɪˌkɪləˈθərmiə/, /ˌpɔɪkəloʊˈθərmiə/ Medicine.
An abnormal loss or lack of the ability to regulate body temperature.
ΘΚΠ
the world > animals > animal body > general parts > internal organs and systems > [noun] > thermogenesis > being of varying body temperature
poikilothermism1903
poikilothermia1921
poikilothermy1939
1921 Physiol. Rev. 1 304 Increased surface blood flow promotes poikilothermia because it facilitates the conduction of heat either to or from the body.
1974 Nature 22 Feb. 568/1 In most newborn animals there is a physiological hypothermia and poikilothermia.
1995 Neurology 45 1602/1 Poikilothermia, defined as fluctuation in core temperature of more than 2°C due to changes in the ambient temperature, is the most common disorder of thermoregulation in humans.
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
<
n.1921