pyritaceousadj.
/ˌpʌɪrᵻˈteɪʃəs/, /ˌpɪrᵻˈteɪʃəs/, U.S. /ˌpaɪrəˈteɪʃəs/, /ˌpɪrəˈteɪʃəs/ rare.
Of the nature of or containing pyrites; pyritic.
ΘΚΠ
the world > the earth > minerals > mineral sources > [adjective] > yielding a mineral or metal > pyrites
pyritical1734
pyritose1741
pyritous1741
pyritic1751
pyrity1757
pyritaceous1784
pyritiferous1828
the world > the earth > minerals > types of mineral > sulphides and related minerals > [adjective] > pyrites
pyritical1734
pyritose1741
pyritous1741
pyritic1751
pyritaceous1784
1784 R. Kirwan Elements Mineral. i. viii. 122 Lapis lazuli... The colour of this stone is a beautiful opake blue,..generally sprinkled over with yellow, bright, pyritaceous specks or streaks.
1859 I. S. Homans & I. S. Homans Cycl. Commerce & Commerc. Navigation (ed. 2) 1508/2 Peat..is formed into oblong pieces for fuel, after the pyritaceous and stony matters are separated from it.
1997 Environmental Pollution 97 162/2 A loamy calcareous soil.., developed on grey marls from the Valanginian period with pyritaceous ammonites.
This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).
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adj.1784