geode: Meaning and Definition of

ge•ode

Pronunciation: ( jē'ōd), [key]
— n.
  1. a hollow concretionary or nodular stone often lined with crystals.
  2. the hollow or cavity of this.
  3. any similar formation.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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