英语词汇“index fossil”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	index fossil
释义	WordReference Random House Unabridged Dictionary of American English © 2024 in′dex fos′sil, [Geol., Paleontol.] Geology, Paleontologya widely distributed fossil, of narrow range in time, regarded as characteristic of a given geological formation, used esp. in determining the age of related formations. `Also called guide fossil.` 1895–1900 Collins Concise English Dictionary © HarperCollins Publishers:: index fossil n a fossil species that characterizes and is used to delimit a geological zone Also called: zone fossil
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更新时间：2024/9/20 7:59:20