geode

[ jee-ohd ]

noun
  1. a hollow concretionary or nodular stone often lined with crystals.

  2. the hollow or cavity of this.

  1. any similar formation.

Origin of geode

1
1670–80; <French géode<Latin geōdēs<Greek geṓdēs earthlike. See geo-, -ode1

Other words from geode

  • ge·od·ic [jee-od-ik], /dʒiˈɒd ɪk/, ge·od·al [jee-ohd-l], /dʒiˈoʊd l/, adjective

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British Dictionary definitions for geode

geode

/ (ˈdʒiːəʊd) /


noun
  1. a cavity, usually lined with crystals, within a rock mass or nodule

Origin of geode

1
C17: from Latin geōdēs a precious stone, from Greek: earthlike; see geo-, -ode 1

Derived forms of geode

  • geodic (dʒɪˈɒdɪk), adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for geode

geode

[ ōd′ ]


  1. A small, hollow, usually rounded rock lined on the inside with inward-pointing crystals. Geodes form when mineral-rich water entering a cavity in a rock undergoes a sudden change in pressure or temperature, causing crystals to form from the solution and line the cavity's walls.

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