Usually means: Crystal-lined cavity in rock.
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We found 29 dictionaries that define the word geode:

General (21 matching dictionaries)
  1. geode: Merriam-Webster
  2. geode: Oxford Learner's Dictionaries
  3. geode: American Heritage Dictionary of the English Language
  4. geode: Collins English Dictionary
  5. geode: Vocabulary.com
  6. Geode, geode: Wordnik
  7. geode: Wiktionary
  8. geode: Webster's New World College Dictionary, 4th Ed.
  9. geode: The Wordsmyth English Dictionary-Thesaurus
  10. geode: Infoplease Dictionary
  11. geode: Dictionary.com
  12. geode: Online Etymology Dictionary
  13. Geode (processor), Geode (trade association), Geode: Wikipedia, the Free Encyclopedia
  14. Geode: Online Plain Text English Dictionary
  15. geode: Webster's Revised Unabridged, 1913 Edition
  16. geode: Rhymezone
  17. Geode: AllWords.com Multi-Lingual Dictionary
  18. geode: Webster's 1828 Dictionary
  19. geode: FreeDictionary.org
  20. geode: Mnemonic Dictionary
  21. geode: TheFreeDictionary.com

Computing (1 matching dictionary)
  1. geode: Encyclopedia

Medicine (3 matching dictionaries)
  1. Dorland's Illustrated Medical Dictionary (No longer online)
  2. online medical dictionary (No longer online)
  3. geode: Medical dictionary

Miscellaneous (1 matching dictionary)
  1. GEODE: Acronym Finder

Science (1 matching dictionary)
  1. Illustrated Glossary of Geologic Terms (No longer online)

Slang (1 matching dictionary)
  1. Geode: Urban Dictionary

Tech (1 matching dictionary)
  1. Geode: Gems and Precious Stones

(Note: See geodes as well.)

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Definitions from Wiktionary (GEODE)

▸ noun:  (geology) A nodule of stone having a cavity lined with mineral or crystal matter on the inside wall.
▸ noun:  (physics) Acronym of generic object of dark energy. (A theoretical alternative to black holes. An object with an event horizon enclosing an interior composed of dark energy.)

Similar:
shell, globulite, gemstone, enhydros, nest, endomorph, amygdaloid, vein, vesicle, guildite, more...

Phrases:
Geode Capital Management, more...

Adjectives:
large, crystal, impervious, lined, huge, giant, hollow, semi, abcd, pascal, small

Colors:
    amethyst,     lavender,     indigo,     sapphire,     turquoise, more...
▸ Word origin

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Similar:
shell, globulite, gemstone, enhydros, nest, endomorph, amygdaloid, vein, vesicle, guildite, more...

Phrases:
Geode Capital Management, more...

Adjectives:
large, crystal, impervious, lined, huge, giant, hollow, semi, abcd, pascal, small

Colors:
    amethyst,     lavender,     indigo,     sapphire,     turquoise, more...



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