英语词汇“Ordovician period”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词

Ordovician period

释义

Noun: Ordovician period

From 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds
- Ordovician

Type of: geological period, period

Part of: Palaeozoic [Brit, Cdn], Paleozoic, Paleozoic era

Encyclopedia: Ordovician period

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