Definition of "ectotherms" [ectotherms]

• Plural form of ectotherm. (noun)

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• "Both amphibians and reptiles are ectotherms, meaning that they derive heat from the environment, rather than producing it internally."
• "As “ectotherms” they depend on the external environment to control their body temperature."
• "Fish are ectotherms, thus, for the most part, their body temperature is governed by that of the surrounding waters."