ge·o·dia \jēˈōdēə\noun Usage: capitalized Etymology: New Latin, from Greek geōdēs earthlike + New Latin -ia — more at geode : a genus (the type of the family Geodiidae) of large deep-sea sponges of the class Demospongiae with anchoring structures that resemble roots • ge·od·i·id\-dēə̇d\adjective or noun