| 释义 |
pyrogenetic, a.|ˌpaɪərəʊdʒɪˈnɛtɪk|
[f. pyro- 1 + -genetic.]
1. a. Having the property of producing heat, esp. in the body; thermogenetic. b. Having the property of producing fever.
1858Mayne Expos. Lex., Pyrogenetic. 1875tr. von Ziemssen's Cycl. Med. I. 255 What the chemical natures of these pyrogenetic processes may be, we have never learnt. 1885Buck's Ref. Handbk. Med. Sc. II. 226 Not the least curious phenomenon of the pyrogenetic mechanism is the influence that increases the resistance to cold. 1896Allbutt's Syst. Med. I. 155 Artificial fever produced by the introduction of pyrogenetic substances.
2. Petrol. Of a mineral: crystallizing from a magma at a high temperature.
1920A. Holmes Nomencl. Petrol. 193 Pyrogenetic minerals, a term applied to the primary magmatic minerals of igneous rocks, excluding those due to pneumatolytic, hydrothermal, and thermodynamic processes... The solidification of a magma may constitute a continuous process beginning with indubitable pyrogenetic minerals, and yet finishing with a well-defined hydrothermal series of minerals. 1923Mineral. Mag. XX. 146 In the granites, tourmaline, muscovite, and topaz..behave as pyrogenetic minerals and commence to crystallize at an early stage but..their crystallization continued to a late stage in the consolidation of the rock. 1950F. H. Hatch et al. Petrol. Igneous Rocks (ed. 10) iii. 163 The separation of these pyrogenetic minerals leaves the liquid relatively enriched in H2O and various other components of low atomic and molecular weights. 1954H. Williams et al. Petrogr. i. 9 The first minerals to form from magma are usually anhydrous... Such minerals are called pyrogenetic. |