plural noun Ceph·a·las·pi·da \-pədə\

Definition of Cephalaspida

  1. :  a class or lesser division of primitive extinct vertebrates including Cephalaspis and a few related genera of Devonian ostracoderms

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Origin and Etymology of cephalaspida

New Latin, from Cephalaspis + -ida

Seen and Heard

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feeling or affected by lethargy

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