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siphonoplax

noun si·phono·plax \ sīˈfänəˌplaks , ˈsīfənōˌp- \
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Definition of siphonoplax

plural -es
: one of the calcareous plates that protect the siphon of various boring mollusks

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Origin and Etymology of siphonoplax

New Latin, from siphon- + Greek plax flat surface, tablet

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