poikilothermic
Definition
Adjective: * Having a body temperature that varies with the surrounding environment; cold-blooded. This term describes animals whose internal temperature is not constant but changes based on the temperature of their surroundings.
Usage
The word "poikilothermic" is a scientific and zoological term. It is used to classify animals and describe their physiological state. * It is the formal, technical synonym for "cold-blooded." * It is typically used in contrast to "homeothermic" or "endothermic" (warm-blooded) animals, such as birds and mammals.
Examples
- Scientific Description:
- Reptiles and amphibians are classic examples of poikilothermic vertebrates.
- The poikilothermic nature of fish means their metabolic rate is directly influenced by water temperature.
- Physiological Process:
- To digest its food, the snake, being poikilothermic, must bask in the sun to raise its body temperature.
- The insect's poikilothermic metabolism slows down dramatically during cold nights.
Advanced Usage
- Noun Form - Poikilothermy: The condition or state of being poikilothermic.
- Poikilothermy presents both challenges and advantages for survival in variable climates.
- Adverb Form - Poikilothermically: Describing an action related to this state.
- The lizard regulates its activity poikilothermically, becoming more active in the heat.
Variants and Related Words
- Poikilotherm (n): An animal that is poikilothermic.
- A frog is a poikilotherm.
- Ectothermic (adj): A closely related term often used interchangeably with "poikilothermic." While very similar, "ectothermic" more specifically emphasizes that the animal gains heat from external sources.
- Heterothermic (adj): Describing an animal that can have varying body temperatures, sometimes including periods of controlled temperature regulation. This is a broader category that can include some poikilotherms.
Synonyms
- Cold-blooded
- Ectothermic (in most general contexts)
Antonyms
- Homeothermic (warm-blooded, constant temperature)
- Endothermic (warm-blooded, internally generating heat)
- Warm-blooded
Adjective
-
of animals except birds and mammals; having body temperature that varies with the environment
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