Geode

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Geode \Ge"ode\ (j[=e]"[=o]d), n. [F. g['e]ode, L. geodes, fr.
     Gr. ? earthlike; ge`a, gh^, the earth + e'i^dos form.] (Min.)
        (a) A nodule of stone, containing a cavity, lined with
            crystals or mineral matter.
        (b) The cavity in such a nodule.
            [1913 Webster]



From WordNet (r) 2.0 [wn]:

  geode
       n : (mineralogy) a hollow rock or nodule with the cavity usually
           lined with crystals