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Definition of conchoidal


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con·choi·dal  audio  (kng-koidl) KEY 

ADJECTIVE:
Of, relating to, or being a surface characterized by smooth, shell-like convexities and concavities, as on fractured obsidian.

ETYMOLOGY:
From Greek konkhoeids, mussellike : konkho-, concho- + -oeids, -oid

OTHER FORMS:
con·choidal·ly(Adverb)


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