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.
Sorry, no etymologies found.