noun spi·ri·fer \ˈspīrəfə(r)\

Definition of spirifer

  1. 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. 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

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of spirifer

New Latin, from spir- + -fer

Seen and Heard

What made you want to look up spirifer? Please tell us where you read or heard it (including the quote, if possible).


feeling or affected by lethargy

Get Word of the Day daily email!