Definition of ectotherm in English:

ectotherm

noun ˈɛktəʊθəːmˈektəˌTHərm

Zoology

An animal that is dependent on external sources of body heat.
〔动〕外温动物，冷血动物，变温动物。常与ENDOTHERM 相对；比较POIKILOTHERM
Often contrasted with endotherm
Compare with poikilotherm
Example sentencesExamples
- The papers cover a substantial range of physiological systems and numerous types of organisms, including ectotherms and endotherms, vertebrates, insects, plants, and bacteria.
- Thus, perhaps the commonly asked question whether dinosaurs were ectotherms or endotherms is inappropriate, and it is more constructive to ask which dinosaurs were likely to have been endothermic and which ones ectothermic.
- It is conceivable, therefore, that during the evolution of endothermy there existed a continuum of physiological constitutions that were intermediate to those known from typical ectotherms and endotherms today.
- Ecological studies suggest that today's endotherms (mammals and birds) generally outcompete ectotherms in their area.
- With regard to the distance traveled before exhaustion, intermittent locomotion can have greater consequences for ectotherms than endotherms.

Derivatives

ectothermic

adjective

Zoology

Dinosaurs were mostly inertial homeotherms; they were ectothermic but maintained a constant body temperature by growing large.
Example sentencesExamples
- The temperature at which the eggs of ectothermic vertebrates incubate can influence several phenotypic traits of offspring.
- Many ectothermic species demonstrate behavioral thermoregulation following feeding in an attempt to increase body temperature, thus increasing temperature-dependent rate processes associated with catabolism.
- A lack of metabolic data has made this association more difficult to assess in most ectothermic vertebrates, and little is known of any possible relationship between genome size and metabolic rate in fishes and reptiles.
- As a result, these animals are able to thrive in environments with cold or highly variable thermal conditions, and in some nocturnal habitats unavailable to ectothermic vertebrates.

ectothermy

noun

Zoology

Endothermy did evolve from ectothermy, and birds did evolve from dinosaurs, which we know came from ectothermic ancestors sometime in the distant past.
Example sentencesExamples
- But the apparent dichotomy between endothermy and ectothermy is misleading; rather, there is a broad spectrum of metabolic types, many of which are directly correlated with the anatomical form and function of the breathing apparatus.
- And even if-they were fully ectothermic, there are large, tropical-latitude lizards, such as the Komodo dragon, alive today that demonstrate that ectothermy by no means implies sluggishness.
- This condition is strikingly similar to the nasal region of many extant reptiles and is strong evidence for low lung ventilation rates and ectothermy, or near-ectothermy, in these dinosaurs.
- Dinosaur bones show no evidence of ectothermy; Mesozoic dinosaurs deposited tissues that in living tetrapods grow at rates that suggest basal metabolic rates significantly higher than those of any living non-avian reptiles.

Definition of ectotherm in US English:

ectotherm

nounˈektəˌTHərm

Zoology

An animal that is dependent on external sources of body heat.
〔动〕外温动物，冷血动物，变温动物。常与ENDOTHERM 相对；比较POIKILOTHERM
Often contrasted with endotherm
Compare with poikilotherm
Example sentencesExamples
- Ecological studies suggest that today's endotherms (mammals and birds) generally outcompete ectotherms in their area.
- The papers cover a substantial range of physiological systems and numerous types of organisms, including ectotherms and endotherms, vertebrates, insects, plants, and bacteria.
- It is conceivable, therefore, that during the evolution of endothermy there existed a continuum of physiological constitutions that were intermediate to those known from typical ectotherms and endotherms today.
- Thus, perhaps the commonly asked question whether dinosaurs were ectotherms or endotherms is inappropriate, and it is more constructive to ask which dinosaurs were likely to have been endothermic and which ones ectothermic.
- With regard to the distance traveled before exhaustion, intermittent locomotion can have greater consequences for ectotherms than endotherms.

单词	ectotherm
释义	Definition of ectotherm in English: ectotherm noun ˈɛktəʊθəːmˈektəˌTHərm Zoology An animal that is dependent on external sources of body heat. 〔动〕外温动物，冷血动物，变温动物。常与ENDOTHERM 相对；比较POIKILOTHERM Often contrasted with endotherm Compare with poikilotherm Example sentencesExamples The papers cover a substantial range of physiological systems and numerous types of organisms, including ectotherms and endotherms, vertebrates, insects, plants, and bacteria. Thus, perhaps the commonly asked question whether dinosaurs were ectotherms or endotherms is inappropriate, and it is more constructive to ask which dinosaurs were likely to have been endothermic and which ones ectothermic. It is conceivable, therefore, that during the evolution of endothermy there existed a continuum of physiological constitutions that were intermediate to those known from typical ectotherms and endotherms today. Ecological studies suggest that today's endotherms (mammals and birds) generally outcompete ectotherms in their area. With regard to the distance traveled before exhaustion, intermittent locomotion can have greater consequences for ectotherms than endotherms. Derivatives ectothermic adjective Zoology Dinosaurs were mostly inertial homeotherms; they were ectothermic but maintained a constant body temperature by growing large. Example sentencesExamples The temperature at which the eggs of ectothermic vertebrates incubate can influence several phenotypic traits of offspring. Many ectothermic species demonstrate behavioral thermoregulation following feeding in an attempt to increase body temperature, thus increasing temperature-dependent rate processes associated with catabolism. A lack of metabolic data has made this association more difficult to assess in most ectothermic vertebrates, and little is known of any possible relationship between genome size and metabolic rate in fishes and reptiles. As a result, these animals are able to thrive in environments with cold or highly variable thermal conditions, and in some nocturnal habitats unavailable to ectothermic vertebrates. ectothermy noun Zoology Endothermy did evolve from ectothermy, and birds did evolve from dinosaurs, which we know came from ectothermic ancestors sometime in the distant past. Example sentencesExamples But the apparent dichotomy between endothermy and ectothermy is misleading; rather, there is a broad spectrum of metabolic types, many of which are directly correlated with the anatomical form and function of the breathing apparatus. And even if-they were fully ectothermic, there are large, tropical-latitude lizards, such as the Komodo dragon, alive today that demonstrate that ectothermy by no means implies sluggishness. This condition is strikingly similar to the nasal region of many extant reptiles and is strong evidence for low lung ventilation rates and ectothermy, or near-ectothermy, in these dinosaurs. Dinosaur bones show no evidence of ectothermy; Mesozoic dinosaurs deposited tissues that in living tetrapods grow at rates that suggest basal metabolic rates significantly higher than those of any living non-avian reptiles. Definition of ectotherm in US English: ectotherm nounˈektəˌTHərm Zoology An animal that is dependent on external sources of body heat. 〔动〕外温动物，冷血动物，变温动物。常与ENDOTHERM 相对；比较POIKILOTHERM Often contrasted with endotherm Compare with poikilotherm Example sentencesExamples Ecological studies suggest that today's endotherms (mammals and birds) generally outcompete ectotherms in their area. The papers cover a substantial range of physiological systems and numerous types of organisms, including ectotherms and endotherms, vertebrates, insects, plants, and bacteria. It is conceivable, therefore, that during the evolution of endothermy there existed a continuum of physiological constitutions that were intermediate to those known from typical ectotherms and endotherms today. Thus, perhaps the commonly asked question whether dinosaurs were ectotherms or endotherms is inappropriate, and it is more constructive to ask which dinosaurs were likely to have been endothermic and which ones ectothermic. With regard to the distance traveled before exhaustion, intermittent locomotion can have greater consequences for ectotherms than endotherms.
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