Definitions

from the GNU version of the Collaborative International Dictionary of English

  • n. A name formerly given to certain Silurian brachiopod shells of the genus spirifer.

from The Century Dictionary and Cyclopedia

  • n. A subgenus of Paleozoic brachiopods, having the general characters of the genus Spirifer, but with the surface of the shell covered with fine concentric lamellæ.

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