Definition of argillite in English:

argillite

noun

mass nounGeology
  • A sedimentary rock that does not split easily, formed from consolidated clay.

    • ‘The Nelson mineral belt was rich in argillite, a dark stone which made fine tools.’
    • ‘Bear images were carved into blocks of argillite, claystone, and wood or sculpted from clay, with the creative three-dimensional transformations displaying a remarkably naturalistic style.’
    • ‘Low water levels reveal carved layers of green and red argillite.’

Origin

Late 18th century: from Latin argilla ‘clay’ + -ite.

Pronunciation

argillite

/ˈɑːdʒɪlʌɪt/