ectotherm

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Definition
  1. Noun:
    • An animal whose body temperature varies with the temperature of its surroundings: An ectotherm is an organism that relies on external environmental heat sources to regulate its body temperature.
    • Any animal except birds and mammals: This term encompasses all animals that are not endotherms (warm-blooded animals), including reptiles, amphibians, fish, and invertebrates.
Usage and Examples
  • Noun:
    • Snakes and lizards are classic examples of ectotherms.
    • The turtle, being an ectotherm, basks in the sun to warm its body.
    • Ectotherms are often more active in warmer environments.
Advanced Usage
  • "Ectothermic" (Adjective): Describing the characteristic of being an ectotherm.
    • Reptiles exhibit ectothermic physiology.
  • In scientific contexts: The term is used to discuss thermoregulation, metabolism, and ecological adaptations.
    • The study compared the metabolic rates of ectotherms and endotherms.
Variants and Related Words
  • Poikilotherm: A near-synonym often used interchangeably with ectotherm, though some scientific distinctions exist.
  • Cold-blooded animal: A common, non-scientific term for an ectotherm.
  • Endotherm: An antonym; an animal that generates internal heat to maintain a constant body temperature (e.g., birds and mammals).
Synonyms
  • Poikilotherm
  • Cold-blooded animal
Antonyms
  • Endotherm
  • Warm-blooded animal
  • Homeotherm (an animal that maintains a stable internal body temperature)
Related Phrases and Contexts
  • Ectothermic metabolism: Refers to the metabolic processes dependent on external temperatures.
  • Behavioral thermoregulation: The strategies ectotherms use (like sun basking or seeking shade) to control their body temperature.
Noun
  1. an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals

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