单词 | stromatolite |
释义 | Word Frequency stromatolite(strəʊˈmætəˌlaɪt) noun a rocky mass consisting of layers of calcareous material and sediment formed by the prolific growth of cyanobacteria: such structures date back to Precambrian times Derived forms stromatolitic (strəʊˌmætəˈlɪtɪk) adjective Word origin C20: from Greek, from strōma covering + -lite |
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