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pygidium

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noun py·gid·i·um \pī-ˈji-dē-əm\

Definition of pygidium

plural

-gidia

\-ˈji-dē-ə\

  1. :  a caudal structure or the terminal body region of various invertebrates

pygidial

play \-dē-əl\ adjective

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Origin and Etymology of pygidium

New Latin, from Greek pygidion, diminutive of pygē rump

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