spirifer (English, noun)
expansion: spirifer (plural spirifers)
Senses:
topics: biology
history
human-sciences
natural-sciences
paleontology
sciences
glosses: Any of numerous species of fossil brachiopods of the genera †Spirifer and †Delthyris and allied genera in order †Spiriferida, in which the long calcareous supports of the arms form a large spiral, or helix, on each side.
Forms:
form: spirifers
tags: plural