What does poikilothermic mean?
Poikilothermic refers to an organism whose body temperature varies with the environment. This is in contrast to endothermic organisms, which maintain a relatively constant body temperature. Many reptiles, amphibians, and fish are poikilothermic, meaning their body temperature changes with the temperature of their surroundings. This can be beneficial for survival, as it allows them to conserve energy and adapt to changing environments. However, it also means they are more susceptible to temperature extremes. Poikilothermic organisms often have specialized physiological adaptations to cope with temperature fluctuations, such as behavioral changes or physiological adjustments. Understanding poikilothermy is essential for studying the biology and ecology of these organisms and their interactions with their environments.
adjectiveHaving a body temperature that varies with the environment, typically being cold-blooded.
- 1. Having a body temperature that varies with the environment
"Many reptiles are poikilothermic, meaning their body temperature changes with the temperature of their surroundings."
"The snake's body temperature dropped significantly after it was removed from the warm rock."
"The poikilothermic fish swam slowly in the cold water."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of poikilothermic
The term 'poikilothermic' comes from the Greek words 'poikilos' (varied) and 'thermos' (heat). It was first used in the late 19th century to describe organisms whose body temperature varies with the environment. The concept of poikilothermy has since been widely studied and applied in various fields, including biology, ecology, and medicine.
Usage notes
Poikilothermic is typically used in formal or scientific contexts to describe organisms whose body temperature varies with the environment. It is not commonly used in everyday language.