单词	index fossil
释义	index fossil noun : a fossil usually with a narrow time range and wide spatial distribution that is used in the identification of related geologic formations Example Sentences Recent Examples on the Web Pappas reports that Agnostus is a great index fossil. Jason Daley, Smithsonian, 19 Sep. 2017 Word History First Known Use 1900, in the meaning defined above
随便看	hapto- haptoglobin haptoglobins Haptopoda haptor haptoral haptotropic haptotropically haptotropism hapu hapuka hapuku haqueton haquetons har hara-kiri hara-kiris harakeke harakiries harakiris Harald V haram harambee harambees harangue

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