ectothermicadj.

/ˌɛktə(ʊ)ˈθəːmɪk/

Etymology: < ectotherm n. + -ic suffix.

Zoology.

Characterized by a body temperature that is entirely determined by the environment. Cf. poikilothermic adj. opposed to endothermic adj. Additions 2.

ΘΚΠ

the world > animals > animal body > general parts > internal organs and systems > [adjective] > relating to thermogenesis > cold-blooded

cold-blooded1602

ectothermic1946

1946 Science 18 Jan. 2664/1 If cold-blooded, they were definitely ectothermic in nature, that is, they derived their chief source of heat from outside of the body in direct contrast to the later warm-blooded or endothermic types in which temperatures are chiefly a result of metabolic activity.

1961 C. H. Pope Giant Snakes 111 For ‘warm-blooded’ they use endothermic, and for ‘cold-blooded’, ectothermic.

1972 Sci. Amer. June 71/2 Most small invertebrate animals have such high rates of heat transfer between themselves and the environment that their energy metabolism contributes little or nothing to the heat content of the body. Such organisms are called ectothermic.

1980 Nature 24 Jan. 381/1 Exceptionally small neonates of modern endotherms are commonly ectothermic at birth.

This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2018).

单词	ectothermic
释义	ectothermicadj. /ˌɛktə(ʊ)ˈθəːmɪk/ Etymology: < ectotherm n. + -ic suffix. Zoology. Characterized by a body temperature that is entirely determined by the environment. Cf. poikilothermic adj. opposed to endothermic adj. Additions 2. ΘΚΠ the world > animals > animal body > general parts > internal organs and systems > [adjective] > relating to thermogenesis > cold-blooded cold-blooded1602 ectothermic1946 1946 Science 18 Jan. 2664/1 If cold-blooded, they were definitely ectothermic in nature, that is, they derived their chief source of heat from outside of the body in direct contrast to the later warm-blooded or endothermic types in which temperatures are chiefly a result of metabolic activity. 1961 C. H. Pope Giant Snakes 111 For ‘warm-blooded’ they use endothermic, and for ‘cold-blooded’, ectothermic. 1972 Sci. Amer. June 71/2 Most small invertebrate animals have such high rates of heat transfer between themselves and the environment that their energy metabolism contributes little or nothing to the heat content of the body. Such organisms are called ectothermic. 1980 Nature 24 Jan. 381/1 Exceptionally small neonates of modern endotherms are commonly ectothermic at birth. This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2018). < adj.1946
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