spirifer

About 0.02 uses per million words.

Meaning

1. noun 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.

Similar words

spirorbid spirillum spirorchiid spirophorid spirobacterium spiraster brach spirogyra spiraculum spirofilid

Often followed by

sp mucronatus cameratus disjunctus limestone gregarius cf aff opimus acuminatus