geode

geode

ge·ode

 (jē′ōd′)

n.

A hollow, usually spheroidal rock with crystals lining the inside wall.

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[French géode, from Latin geōdēs, a precious stone, from Greek, earthlike : gē, earth + -ōdēs, adj. suff.; see collodion.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

geode

(ˈdʒiːəʊd)

n

(Geological Science) a cavity, usually lined with crystals, within a rock mass or nodule

[C17: from Latin geōdēs a precious stone, from Greek: earthlike; see geo-, -ode¹]

geodic adj

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ge•ode

(ˈdʒi oʊd)

n.

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

2. the hollow or cavity of this.

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

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

geode

ge·ode

(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® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

geode

A hollow nodule of rock lined inside with crystals.

Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited

Thesaurus

Noun

1.

geode - (mineralogy) a hollow rock or nodule with the cavity usually lined with crystals mineralogy - the branch of geology that studies minerals: their structure and properties and the ways of distinguishing them nodule - (mineralogy) a small rounded lump of mineral substance (usually harder than the surrounding rock or sediment)

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