rudist

词形变化

rudists 复数 rudists

释义与例句

n.
  1. 1.

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

    生物

词源

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

来源：wiktionary