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pygidium

noun py·gid·i·um \ pī-ˈji-dē-əm \
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Definition of pygidium

plural -gidia play \pī-ˈji-dē-ə\
: a caudal structure or the terminal body region of various invertebrates
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pygidial

play \pī-ˈji-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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