geode
/ˈdʒiːəʊd/noun
1- a small cavity in rock lined with crystals or other mineral matter晶洞。
1.1
- a rock containing such a cavity晶岩石。
派生词
geodic
/dʒiːˈɒdɪk/ adjective词源
late 17th cent.: via Latin from Greek geōdēs 'earthy', from gē 'earth'.