noun
Meaning 1
Any of many box-, tube- or ring-shaped marine heterodont bivalves from the Jurassic and Cretaceous periods.
Definition source: English Wiktionary via Wiktextract
Topics: biology, history, human-sciences, natural-sciences, paleontology, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided