POIKILOTHERMIC
poikilothermic, poikilothermous, heterothermic, ectothermic
(adjective) of animals except birds and mammals; having body temperature that varies with the environment
Source: WordNet® 3.1
Etymology
Adjective
poikilothermic (not comparable)
(of an animal) Having a body temperature that varies depending on the outside temperature.
Synonyms
• cold-blooded
• poikilothermal
• poikilothermous
Antonyms
• homeothermic
Source: Wiktionary
Poi`ki*lo*ther"mal, Poi`ki*lo*ther"mic, a. Etym: [Gr. thermal,
thermic.] (Physiol.)
Definition: Having a varying body temperature. See Homoiothermal.
Source: Webster’s Unabridged Dictionary 1913 Edition