Main Entry: py·gid·i·um

Pronunciation: \pī-ˈji-dē-əm\

Function: noun

Inflected Form(s): plural -gid·ia\-ˈji-dē-ə\

Etymology: New Latin, from Greek pygidion, diminutive of pygē rump

Date: circa 1849

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

— py·gid·i·al \-dē-əl\ adjective