argillite

noun

A fine-grained sedimentary rock, intermediate between shale and slate, sometimes used as a building material

Similar Words

argali argent /ˈɑːdʒənt/ argh /ɑɹɡ/ argil argol argon /ˈɑːɹɡɒn/ argot /ˈɑːɡəʊ/ argots arguable /ˈɑːɡjuəbl/ arguably