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geode

[jee-ohd] /ˈdʒi oʊd/
noun
1.
a hollow concretionary or nodular stone often lined with crystals.
2.
the hollow or cavity of this.
3.
any similar formation.
Origin of geode
1670-1680
1670-80; < French géode < Latin geōdēs < Greek geṓdēs earthlike. See geo-, -ode1
Related forms
geodic
[jee-od-ik] /dʒiˈɒd ɪk/ (Show IPA),
geodal
[jee-ohd-l] /dʒiˈoʊd l/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for geode
Historical Examples
  • geode, an irregular shaped stone, containing a small cavity.

  • The geode is a spherical and apparently solid stone, but when broken is found to be hollow and coated with crystals.

    The Smoky God Willis George Emerson
  • The geode has a hollow cell within, lined with beautiful crystals of many colors.

  • No date; no place mentioned; we note the suggestion that it was only a geode, which had been upon the ground in the first place.

    The Book of the Damned Charles Fort
  • A geode is a hollow shell of stone, usually quartz, lined with crystals pointing toward the center.

    The Chautauquan, Vol. III, March 1883 The Chautauquan Literary and Scientific Circle
British Dictionary definitions for geode

geode

/ˈdʒiːəʊd/
noun
1.
a cavity, usually lined with crystals, within a rock mass or nodule
Derived Forms
geodic (dʒɪˈɒdɪk) adjective
Word Origin
C17: from Latin geōdēs a precious stone, from Greek: earthlike; see geo-, -ode1
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
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Word Origin and History for geode
n.

rounded stone with a hollow center lined with crystals, 1670s, from French géode, from Latin geodes, from Greek geodes "earthy, earth-like," from ge "earth" (Homeric gaia; see Gaia) + -oides, adjective suffix, "characterized by." Perhaps so called in reference to the "earthy" minerals inside.

Online Etymology Dictionary, © 2010 Douglas Harper
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geode in Medicine

geode ge·ode (jē'ōd')
n.
A cystlike space with or without an epithelial lining, usually observed in subarticular bone in arthritic disorders.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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geode in Science
geode
  (jē'ōd')   
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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