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| con·choi·dal [ kong kóyd'l ] |
adjective |
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1. shell-shaped: used to describe fracture surfaces in rocks and minerals that are concave or convex and shaped like shells
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2. with smooth ridges and depressions: having or being a surface shaped like a bivalve shell with smooth ridges and depressions
 conchoidal fracture
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 con·choi·dal·ly adverb |
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