rudist

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

• Rhymes: -uːdɪst

rudist (plural rudists)

1. (paleontology) Any of many box-, tube- or ring-shaped marine heterodont bivalves from the Jurassic and Cretaceous periods. [from 19th c.]
   • 2018, Tim Flannery, Europe: The First 100 Million Years, Penguin, published 2019, page 27:

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

• turdis

Borrowed from French rudiste.

rudist m (plural rudiști)

1. rudist