| 释义 |
endotherm, n.|ˈɛndə(ʊ)θɜːm|
[f. endo- + Gr. θέρµ-η heat, after homœotherm, etc.]
1. Zool. An endothermic animal.
1940R. B. Cowles in Amer. Naturalist LXXIV. 550 The implication of the name ‘homoiotherms’, which suggests the immutability of normal temperatures, is belied by many birds and mammals, and furthermore, both as a more suitable and logical contrast to the ectotherms, it is suggested that the warm blooded organisms may be conveniently referred to as endotherms. 1958Evolution XII. 349/1 The usual outward flow of heat in the endotherms, i.e. from body to the environment. 1972Nature 14 July 81/1 Most birds and mammals are endotherms, producing at rest an order of magnitude more heat than a reptile of the same weight at the same temperature. 1985D. Norman Illustr. Encycl. Dinosaurs 188/3 The proposition that Bakker made was that only animals with an endothermic physiology are capable of walking with an erect gait; therefore dinosaurs must have been endotherms.
2. Physical Chem. A part of a graph corresponding to an endothermic reaction or change, especially during the gradual heating of a substance.
1955Analytical Chem. XXVII. 337/1 The order of reproducibility is such that semiquantitative calculations of the heat effects involved in these simple and well-defined endotherms are fairly reliable. 1960Textile Res. Jrnl. XXX. 801/2 It is not possible..to present more than..speculations regarding the apparently double-peaked endotherms found for wool and mohair. 1975Physics Bull. Dec. 525/2 The gel crystals (A) have sharp melt endotherms and produce distinct x ray patterns. 1987Nature 10 Dec. 552/1 The DSC scans of the annealed samples showed an S-shaped endotherm in the temperature range, 134–152 K, which is characteristic of the glass transition. |