rudist.
Any of many box-, tube- or ring-shaped marine heterodont bivalves from the Jurassic and Cretaceous periods.
Meaning & usage
Any of many box-, tube- or ring-shaped marine heterodont bivalves from the Jurassic and Cretaceous periods.
Where this word comes from
From French rudistes (plural), from rude (“rough, uneven”), or its source, Latin rudis. Compare scientific Latin Rudista.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.