spi·​ri·​fer | \ ˈspīrəfə(r)\

Definition of spirifer

1 capitalized : a large genus (the type of the family Spiriferidae) of articulate brachiopods that have the arms supported within the shell by long spirally coiled spiralia which form a pair of cones with their apexes directed more or less laterally toward the ends of the long hinge line and that abound in Silurian, Devonian, and Carboniferous formations
2 or spiriferid \ spīˈrifərə̇d \ plural -s [ spiriferid from New Latin Spiriferidae family of brachiopods, from Spirifer, type genus + -idae ] : any brachiopod of Spirifer or a related genus

called also spire-bearer

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History and Etymology for spirifer

New Latin, from spir- + -fer

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to move or obtain by small maneuvers

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