| 单词 | biostrome |
| 释义 | biostrome in British English (ˈbaɪəˌstrəʊm) noun a rock layer consisting of a deposit of organic material, such as fossils Word origin C20: from bio- + Greek strōma coveringbiostrome in American English (ˈbaɪoʊˌstroʊm) US noun a flat, thin limestone layer consisting predominantly of marine fossils, as corals see also bioherm Word origin < bio- + Gr strōma, a mattress, bed, rug < IE base *ster-, to spread out > straw, strew |
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