Definition of diatomite in English:

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Pronunciation: /dīˈadəˌmīt/


A fine-grained sedimentary rock formed from consolidated diatomaceous earth.
Example sentences
  • Diatoms have an extensive fossil record going back to the Cretaceous; some rocks are formed almost entirely of fossil diatoms, and are known as diatomite or diatomaceous earth.
  • The richest sources of diatom fossils are deposits of their skeletons known as diatomite, or diatomaceous earth.
  • By this time, both groups were abundant and diversified globally, so much so that diatomite is a common marine sediment of the Miocene.


Late 19th century: from diatom + -ite1.

For editors and proofreaders

Syllabification: di·at·o·mite

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