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Definition of Aptychus
1. n. A shelly plate found in the terminal chambers of ammonite shells. Some authors consider them to be jaws; others, opercula.
Medical Definition of Aptychus
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Lexicographical Neighbors of Aptychus
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1. n. A shelly plate found in the terminal chambers of ammonite shells. Some authors consider them to be jaws; others, opercula.
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