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protaspis

noun pro·tas·pis \ -pə̇s \

Definition of protaspis

plural protaspides \-pəˌdēz\
: the minute discoid or oval first larval form of a trilobite that has a well-marked axial lobe, large head region, and but little segmentation

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Origin and Etymology of protaspis

New Latin, from prot- + -aspis

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