Definition of nummulite in English:

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Pronunciation: /ˈnəmyəˌlīt/


The flat disk-shaped calcareous shell of a foraminifer, found commonly as a fossil up to 8 cm across in marine Tertiary deposits.
  • Family Nummulitidae, order Foraminiferida: several genera, including Nummulites.
Example sentences
  • The occurrence higher in the succession of nummulites and neritic fossils indicates overall shallowing upwards.
  • They found that the Eocene nummulites lived in nutrient-rich environments during a warm climatic phase.
  • In the seas, the calcareous nannofossils were still in evidence but in shallow waters the benthonic nummulite and other larger foraminifera became very abundant.


Early 19th century: from Latin nummulus (diminutive of nummus 'coin') + -ite1.

For editors and proofreaders

Syllabification: num·mu·lite

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