Dictionary

index fossil

noun

Definition of INDEX FOSSIL

:  a fossil usually with a narrow time range and wide spatial distribution that is used in the identification of related geologic formations
ADVERTISEMENT

First Known Use of INDEX FOSSIL

1900

Browse

Next Word in the Dictionary: index fundPrevious Word in the Dictionary: index forestAll Words Near: index fossil
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears