INDEX FOSSIL

Pronunciation (US):

(GB):

 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 found

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)

Credits