synaptychus
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synaptychus — n. [Gr. syn, together; apo , away from; ptychos, fold] (MOLLUSCA: Cephalopoda) Double calcareous plates fused with other paired plates; see anaptychus … Dictionary of invertebrate zoology
synaptychus — syn·aptychus … English syllables
anaptychus — n. [Gr. an, without; apo , away from; ptychos, fold] (MOLLUSCA: Cephalopoda) A shelly plate found in some fossil cephalopods, thought to function as an operculum; see synaptychus … Dictionary of invertebrate zoology
