Poikilotherm - English Definition & Meaning

Definition

A 'poikilotherm' is an organism whose internal body temperature varies considerably depending on the ambient environmental temperature. Unlike homeotherms, they don't maintain a stable internal temperature; instead, it fluctuates with their surroundings. Think of them as having a thermostat that's directly linked to the outside weather 🌡️📉. Reptiles, amphibians, and fish are often poikilotherms. They rely on external sources of heat to regulate their body temperature. This means they're more active in warm conditions and sluggish in cold ones. This adaptation allows them to conserve energy.

Etymology

The word 'poikilotherm' comes from the Greek words 'poikilos,' meaning 'varied' or 'changeable,' and 'thermē,' meaning 'heat.' The name directly reflects the varying body temperature of these organisms. It's a term used in biology to classify animals based on their temperature regulation strategies. The 'poikilo-' prefix indicates variability or changeability. The word describes a body temperature that is not constant. Etymology emphasizes thermal variability.

Related Words

Examples

• "Reptiles are poikilotherms, so they bask in the sun to warm up."
• "Fish are poikilotherms, and their activity level depends on the water temperature."
• "Poikilotherms require less energy than homeotherms because they don't regulate their own temperature."
• "The snake, being a poikilotherm, was sluggish on the cold morning."

Encouragement

Use 'poikilotherm' in your next science class and impress your teacher with your knowledge of animal physiology! It's a great word to show you understand the different ways animals regulate their body temperature. Plus, it's fun to say and sounds super scientific! 🔬

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