Dictionary.com

geode

[ jee-ohd ]
/ ˈdʒi oʊd /
Save This Word!

noun
a hollow concretionary or nodular stone often lined with crystals.
the hollow or cavity of this.
any similar formation.
QUIZ
FIRE UP YOUR VOCAB FOR A "RED" SYNONYMS QUIZ
No fire engine reds here, only a fierce collection of vibrant words for the color red to test yourself on.
Question 1 of 7
What does "amaranth" mean?
Meet Grammar CoachWrite or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing
Meet Grammar CoachImprove Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

Origin of geode

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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use geode in a sentence

British Dictionary definitions for geode

geode
/ (ˈdʒiːəʊd) /

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

Derived forms of geode

geodic (dʒɪˈɒdɪk), adjective

Word Origin for geode

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

Medical definitions for geode

geode
[ jēōd′ ]

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.

Scientific definitions for geode

geode
[ jēōd′ ]

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
FEEDBACK