Ectothermic - English Definition & Meaning

Definition

Ectothermic animals rely on external sources of heat to regulate their body temperature. They absorb heat from their surroundings, such as sunlight or warm surfaces. Think of a lizard basking on a rock to warm up. This is in contrast to endothermic animals like mammals that generate their own heat. Reptiles, amphibians, and insects are ectothermic. Their activity levels are highly dependent on environmental temperatures.

Etymology

The word 'ectothermic' comes from the Greek words 'ektos' meaning 'outside' or 'external' and 'thermē' meaning 'heat.' Thus, 'ectothermic' means 'outside heat.' This accurately describes their reliance on external heat sources. The term highlights their dependence on the environment. The word became prominent with studies in comparative animal physiology.

Related Words

Examples

• "Snakes are ectothermic and require sunlight to raise their body temperature."
• "Lizards are ectothermic, so they are more active during the day."
• "The study examined how ectothermic animals adapt to desert conditions."
• "The metabolic rate of ectothermic animals is affected by external temperatures."

Encouragement

Ectothermic may sound intimidating, but it simply means relying on external heat. Use it when talking about reptiles, amphibians, or insects. Appreciating this term will help you understand animal adaptations to their environments! 🐠

Learn More

📖 Learn more on Wikipedia