Definition of pyritaceous in English:

pyritaceous

adjective

rare
  • Of the nature of or containing pyrites; pyritic.

Origin

Late 18th century; earliest use found in Richard Kirwan (1733–1812), chemist and mineralogist. From pyrites + -aceous.

Pronunciation

pyritaceous

/ˌpɪrɪˈteɪʃəs//ˌpʌɪrɪˈteɪʃəs/