Definitions

from The Century Dictionary.

  • noun In the classification of the Paleozoic series of Pennsylvania, according to H. D. Rogers, a group of rocks of great thickness, belonging to the Carboniferous, and lying between the Seral or Millstone-grit and the Vespertine.
  • Pertaining to an umbra.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Of or pertaining to an umbra.

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