Definitions

from the GNU version of the Collaborative International Dictionary of English

  • n. A large clavate spine of a fossil sea urchin.

from The Century Dictionary and Cyclopedia

  • n. The clavated fossil spine of a very large egg-shaped echinus.
  • n. The basalt capping the coal-measures on the Titterstone and Brown Clee hills in Shropshire, England; also, the local name of a limestone-bed belonging to the White Lias (Rhætic) in Somersetshire.
  • n. Crystallized iron pyrites or pyrite, early used as a gem.

Etymologies

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