organism whose internal body temperature varies with and remains closed to environmental temperatures; poikilotherms were once called "cold-blodded"
= as the environmental temperature varies a poikilotherm's temperature varies with it This is not quite the same as cold blooded, because an animal may use behavior to change it's temperature Contrast with: homeotherm
an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals
An animal whose body temperature varies with the surrounding environment (e g amphibians and fish)
{i} (Zoology) ectotherm, cold-blooded organism, organism that has a variable body temperature which is regulated by the environment (such as reptiles and frogs)
An animal whose body temperature varies according to the temperature of its surroundings