单词 | chalcedony |
释义 | Word Frequency chalcedony(kælˈsɛdənɪ) or calcedony nounWord forms: plural -nies a microcrystalline often greyish form of quartz with crystals arranged in parallel fibres: a gemstone. Formula: SiO2 Derived forms chalcedonic (ˌkælsɪˈdɒnɪk) adjective Word origin C15: from Late Latin chalcēdōnius, from Greek khalkēdōn a precious stone (Revelation 21:19), perhaps named after Khalkēdōn Chalcedon, town in Asia Minor |
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