Definition of poikilothermism in English:

poikilothermism

Pronunciation /ˌpɔɪkɪlə(ʊ)ˈθəːmɪz(ə)m/

noun

Zoology Physiology
  • Poikilothermy. Also (Medicine): = "poikilothermia".

Origin

Early 20th century; earliest use found in Journal of Physiology. From poikilotherm- + -ism.