| 单词 | archaeocyathid |
| 释义 | Archaeocyathid in American English (ˌɑːrkiouˈsaiəθɪd, ɑːrˌkiə-) noun one of the marine invertebrates of the extinct phylum Archaeocyatha, widely distributed during the Cambrian Period, having a limy, typically conical or cylindrical skeleton composed of sievelike inner and outer walls Word origin [‹ NL Archaeocyath(us) genus name (archaeo- archaeo- + L cyathus ladle ‹ Gk kýathos) + -id2] |
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