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noun
Any of numerous species of fossil brachiopods of the genera †Spirifer and †Delthyris and allied genera in order †Spiriferida, in which the long calcareous supports of the arms form a large spiral, or helix, on each side.
Definition source: English Wiktionary via Wiktextract
Topics: biology, history, human-sciences, natural-sciences, paleontology, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
From Latin spira (“a coil”) + fero (“to bear”).
