Definitions from Wiktionary (index fossil)
▸ noun: Any ancient remains of a plant or animal that lived during a specific geological period and that can be used to date the containing rocks.
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▸ noun: Any ancient remains of a plant or animal that lived during a specific geological period and that can be used to date the containing rocks.
Similar:
fossil,
paleofauna,
archaeofauna,
palaeofauna,
paleorecord,
paleofeces,
palaeoecology,
reliquiae,
palaeoflora,
relative dating,
more...
Opposite:
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▸ Rhymes of index fossil
▸ Invented words related to index fossil