geodePronunciation: /ˈdʒiːəʊd/Definition of geode noun a small cavity in rock lined with crystals or other mineral matter. a rock containing a geode. Derivatives geodicPronunciation: /dʒiːˈɒdɪk/ adjective Origin: late 17th century: via Latin from Greek geōdēs 'earthy', from gē 'earth'geode in other Oxford dictionaries Definition of geode in the US English dictionary
