rudist

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noun

Any of many box-, tube- or ring-shaped marine heterodont bivalves from the Jurassic and Cretaceous periods.

OriginFrench rudistes ← Latin rudis →
First used 19th c.Scrabble 7
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Meanings

nounrudist (plural rudists)

plural rudists

  1. biologyAny of many box-, tube- or ring-shaped marine heterodont bivalves from the Jurassic and Cretaceous periods.First known use 19th c.

    In its shallow waters, now-extinct clams known as rudists formed extensive beds.

    2018, Tim Flannery, Europe: The First 100 Million Years, Penguin, published 2019, page 27

Origin

  1. Latinrudis
  2. Frenchrudistes
  3. Englishrudist

From French rudistes (plural), from rude (“rough, uneven”), or its source, Latin rudis. Compare scientific Latin Rudista.

More words from French, Latin

Full word history & related roots →

Rhymes & wordplay

Rhymes with rudist

nudistBuddhist
All rhymes →

Anagrams

turdis
Cite this entry
APA

rudist. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/rudist

MLA

“rudist.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/rudist. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “rudist,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/rudist.

Source: rudist on Wiktionary, CC BY-SA 4.0.