Medical Definition of Index fossils

1. Fossils (or groups of fossils) which are used by geologists and paleontologists to help correlate different events or processes in different parts of the world which happened at the same time. Species which make good index fossils are able to tolerate a wide range of ecological conditions, are geographically widespread, common, easy to find, and evolutionarily short-lived (that is, they speciated and then quickly became extinct). In general, they are also planktonic and very small. (09 Oct 1997)

Lexicographical Neighbors of Index Fossils

indexers
indexes
indexical
indexicals
indexical signs
indexing
indexings
indexless
index ametropia
index case
index case
index extensor muscle
index finger
index finger
index fossil
index fossils (current term)
index fund
index hypermetropia
index myopia
index number
index of refraction
index of refraction
index register
india
India
India-rubber fig
India-rubber plant
India-rubber tree
Indiaman
indian

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