spirifer Meaning, Definition & Usage

Spi"ri*fer noun

Etymology

NL., fr. L. spira a coil + ferreto bear.

Definitions

1. (Paleon.) 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.