单词 | opal |
释义 | Word Frequency opal(ˈəʊpəl) noun an amorphous, usually iridescent, mineral that can be of almost any colour, found in igneous rocks and around hot springs. It is used as a gemstone. Composition: hydrated silica. Formula: SiO2.nH2O Derived forms opal-like (ˈopal-ˌlike) adjective Word origin C16: from Latin opalus, from Greek opallios, from Sanskrit upala precious stone |
随便看 |
英语词典包含233703条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。