Library / English Dictionary

    INDEX FOSSIL

    Pronunciation (US): Play  (GB): Play

     I. (noun) 

    Sense 1

    Meaning:

    A fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is foundplay

    Synonyms:

    guide fossil; index fossil

    Classified under:

    Nouns denoting natural objects (not man-made)

    Hypernyms ("index fossil" is a kind of...):

    fossil (the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil)

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