nummulitic limestone


num·​mu·​lit·​ic limestone ˌnəm-yə-ˈli-tik- How to pronounce nummulitic limestone (audio)
: the most widely distributed and distinctive formation of the Eocene in Europe, Asia, and northern Africa

Word History


New Latin Nummulites, genus of foraminafers characteristic of such limestone (from Latin nummulus "coin" + New Latin -ītēs -ite entry 1) + -ic entry 1 — more at nummular

Note: The genus name Nummulites was introduced by J.B. lamarck in Système des animaux sans vertèbres (Paris, 1801), p. 101; Latin nummulus alludes to the coin-like shape of the fossils.

First Known Use

1830, in the meaning defined above

Time Traveler
The first known use of nummulitic limestone was in 1830

Dictionary Entries Near nummulitic limestone

Cite this Entry

“Nummulitic limestone.” Dictionary, Merriam-Webster, Accessed 24 May. 2024.

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