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  1. ironstone

    • IPA[ˈī(ə)rnˌstōn]

    美式

    • n.
      sedimentary rock containing a substantial proportion of iron compounds.;a kind of dense, opaque stoneware.
    • noun: ironstone, plural noun: ironstones

    • 更多解釋
    • IPA[ˈʌɪənstəʊn]

    英式

    • n.
      sedimentary rock containing a substantial proportion of iron compounds.

    Oxford Dictionary