pyrogenicadj.
/ˌpʌɪrə(ʊ)ˈdʒɛnɪk/, U.S. /ˌpaɪroʊˈdʒɛnɪk/ 1.
a. Produced by or resulting from the action of fire or heat; (Geology) produced from or by the action of magma; (of rocks) igneous.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective]
fire-born?a1656
igneous1661
Plutonic1794
pyrogenous1821
Plutonian1823
pyrogenic1823
1823 tr. A. von Humboldt Geognostical Ess. Superposition Rocks 405 Basalts of the formation exclusively called pyrogenic [Fr. pyrogène].
1840 Philos. Trans. (Royal Soc.) 130 287 Heated, it gives water and other pyrogenic products, but neither melts nor does it volatilize.
1851 Lancet 12 Apr. 405/2 This oil of cade is a pyrogenic oil, prepared by the distillation of the trunk and larger branches of the old juniper.
1904 A. W. Grabau in Amer. Geologist 33 230 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.
1968 R. V. Fisher Pyrogenic Mineral Stability 1 The stability sequence of pyrogenic minerals from altered dacitic volcaniclastic rocks in the..formation..varies with their different depositional environments.
2001 Jrnl. Herpetol. 35 174/1 It is critical to determine whether clear cutting provides an adequate fire substitute for scrub organisms that are dependent upon a pyrogenic successional cycle.
b. Chemistry. Of a reaction: caused by the application of heat.
ΘΚΠ
the world > matter > chemistry > chemical reactions or processes > [adjective] > of or relating to named chemical reactions or processes > having undergone pyrolysis > pyrogenic
pyrogenic1887
pyrogenetic1906
1887 Jrnl. Chem. Soc. 52 i. 572 (heading) Pyrogenic reactions.
1912 Jrnl. Chem. Soc. 101 ii. 1453 One of the authors was engaged in examining the pyrogenic decomposition of American turpentine with the object of obtaining isoprene in quantity.
1931 Jrnl. Physical Chem. 35 3498 The relation of cyclohexane to benzene in the pyrogenic reaction can perhaps be explained by the spatial relations of the atoms.
1965 Isis 56 318 The preparation and subsequent pyrogenic decomposition of iron nitrate.
2. Medicine. Inducing fever; of or relating to the production of fever.
ΘΚΠ
the world > health and disease > ill health > a disease > fever > [adjective] > producing
feverous1603
feverish1653
febrific1710
febrifacient1803
pyrogenetic1871
pyrogenic1871
pyrogenous1874
1871 Lancet 30 Sept. 485/1 These operate like the products of the disintegration of the body generally as pyrogenic agents.
1877 F. T. Roberts Handbk. Med. (ed. 3) I. 80 Dr. Burdon-Sanderson found..that by injecting certain fluids—which he terms ‘pyrogenic’—..fever could be excited.
1946 Nature 31 Aug. 294/1 It is non~hæmolytic and does not produce any pyrogenic effect on intramuscular injection in man.
1962 Lancet 2 June 1140/2 The pyrogenic agent ‘Pyrexal’ increases excretion of urinary white blood-cells in patients with pyelonephritis.
1995 L. Garrett Coming Plague (new ed.) xii. 403 Schlievert set to work testing the effect of pyrogenic exotoxin on mice and rabbits.
Compounds
ΚΠ
1864 H. Watts 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.
This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).
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adj.1823