Definition of homeotherm in English:

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Pronunciation: /ˈhōmēəˌTHərm/
(also homoiotherm)


An organism that maintains its body temperature at a constant level, usually above that of the environment, by its metabolic activity. Often contrasted with poikilotherm; compare with warm-blooded.
Example sentences
  • Also, there are large mammals which are endotherms, not inertial homeotherms.
  • Man is a homeotherm, meaning that body temperature is kept within narrow limits by complex control mechanisms.
  • As ground-nesting homeotherms, alpine and arctic birds must meet similar physiological requirements for breeding to other birds, but in more extreme conditions.



Pronunciation: /ˌhōmēəˈTHərməl/
Example sentences
  • The increase in the metabolic rate elicited in homoiothermal animals by exposure to cold is attributed by many investigators exclusively to striated muscle.
  • When this happens, I'm told, the homeothermal regulatory mechanisms are so overwhelmed that they are no longer able to cope with the effects of the sun on our unpredictable sack of bones.
  • Because of this function, it is considered to be an important factor that determines the efficiency of energy metabolism in homeothermal animals.


Pronunciation: /ˌhōmēəˈTHərmik/
Example sentences
  • Reproductive effort may increase with high food abundance, especially for homeothermic endotherms, due to increased reproductive allocations and relatively stable metabolizable energy intake.
  • General anesthesia inactivates the body's temperature-regulating mechanism and transforms the homeothermic body into a poikilothermic body - one that is altered by the temperature of the environment.
  • The homeothermic capacity of chicks varied as a function of brood size, age, and air temperature.


Example sentences
  • In part because of their high metabolic rates (associated with homeothermy and endothermy), mammals often play an ecological role that seems disproportionately large compared to their numerical abundance.
  • Most proponents of the insulation theory agree that the evolution of homoiothermy predated the evolution of avian flight and that the origin of avian flight was from an elevated site [i.e., tree-down] rather than from the ground-up.
  • Endothermic homeothermy, or ‘warmbloodedness,’ is one of the major evolutionary developments of vertebrates, and among the most significant features that distinguish existing birds and mammals from reptiles, amphibians and fish.


Late 19th century: modern Latin, from Greek homoios 'like' + thermē 'heat'.

For editors and proofreaders

Syllabification: ho·me·o·therm

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