Bible Dictionaries
Spirifer
Webster's Dictionary
(n.) Any one of numerous species of fossil brachipods of the genus Spirifer, or Delthyris, and allied genera, in which the long calcareous supports of the arms form a large spiral, or helix, on each side.
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Bibliography Information
Webster, Noah. Entry for 'Spirifer'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/s/spirifer.html. 1828.