| 单词 | graptolite |
| 释义 | graptolite /grapˈtə-līt/ (geology)nounOne of a group of fossil Hydrozoa with one or two rows of hydrothecae on a simple or branched polypary, characteristic Silurian fossils with an appearance almost like writing upon shales ORIGIN: Gr graptos written, from graphein to write, and lithos stone graptolitˈic adjective |
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