An animal that is dependent on or capable of the internal generation of heat; a warm-blooded animal. Often contrasted with ectotherm. Compare with homeotherm.
- They are endotherms and they can finely tune the thermal, water, and chemical balance of their bodies from minute to minute.
- However, the problem is severe for an endotherm, particularly a small endotherm, which must maintain a steady internal temperature and has a considerably greater demand for respiratory oxygen.
- Extant birds are accomplished endotherms and many maintain the highest body temperatures.
- Example sentences
- ‘How did endothermy evolve in mammals?’
- The main basis for the faster absorption of nutrients in mammals to fuel endothermy and increased activity relative to reptiles has been shown to be a much greater intestinal surface area in mammals.
- Toward the end of the reign of dinosaurs, some animals, the future mammals and birds, evolved endothermy.
1940s: from endo- 'within', on the pattern of homoiotherm.
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