geode

(Anglais)

A nodule of stone having a cavity lined with mineral or crystal matter on the inside wall.

Prononcé comme (IPA)
/ˈdʒiː.əʊd/
Étymologie (Anglais)

From French géode, from Latin geōdēs, from Ancient Greek γεώδης (geṓdēs, “earthlike”), equivalent to γῆ (gê, “earth”) + -ώδης (-ṓdēs).

miarolitic cavity

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