Definitions for "Heterothermic"
of animals except birds and mammals; having body temperature that varies with the environment
Having a variable body temperature.
having a body temperature that fluctuates with that of the immediate environment; having no mechanism or a poorly developed mechanism for regulating internal body temperature. animals that have little or no ability to regulate their body temperature, body temperatures fluctuate with the temperature of their environment, often referred to as 'cold-blooded'.