pygidium
py·gid·i·um
noun \pī-ˈji-dē-əm\ plural -gid·ia \-ˈji-dē-ə\
Definition of PYGIDIUM
: a caudal structure or the terminal body region of various invertebrates
— py·gid·i·al \-dē-əl\ adjective
Origin of PYGIDIUM
New Latin, from Greek pygidion, diminutive of pygē rump
First Known Use: circa 1849
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