| 释义 |
pyrogenic, a.|-ˈdʒɛnɪk|
[f. as pyrogen + -ic.]
†1. Geol. = pyrogenous 1 a. Obs. rare.
1853Th. Ross Humboldt's Trav. III. xxxii. 370 The ancient pyrogenic rocks which I found near Parapara. 1904A. W. Grabau in Amer. Geologist XXXIII. 230 Returning now to the..chemically deposited rocks, we may readily distinguish four groups... The first..includes the well recognized Igneous rocks, to which the term pyrogenic is applicable.
†2. Chem. Name for a supposed peculiar acid, now identified with formic acid. Obs.
1864–72Watts Dict. Chem. II. 684 Tünnermann (Pogg. Ann. xv. 307) thought that he had discovered two peculiar acids, to which he gave the names of pyrogenic and amylenic acids.
3. Phys. and Path. = pyrogenetic b.
1877Roberts Handbk. Med. (ed. 3) I. 80 Dr. Burdon-Sanderson found..that by injecting certains fluids—which he terms ‘pyrogenic’—..fever could be excited. 1896Allbutt's Syst. Med. I. 157 The pyrogenic substance was perhaps a body analogous to the unformed ferments.
4. Chem. Caused by the application of heat.
1887Jrnl. Chem. Soc. LII. i. 572 (heading) Pyrogenic reactions. 1912Ibid. CI. ii. 1453 One of the authors was engaged in examining the pyrogenic decomposition of American turpentine with the object of obtaining isoprene in quantity. 1920Ibid. CXVIII. i. 589 (heading) Pyrogenic acetylene condensations. |