ommatidium

noun om·ma·tid·i·um \ˌä-mə-ˈti-dē-əm\

plural om·ma·tid·ia\-dē-ə\

Definition of OMMATIDIUM

: one of the elements corresponding to a small simple eye that make up the compound eye of an arthropod

— om·ma·tid·i·al \-dē-əl\ adjective

New Latin, from Greek ommat-, omma eye; akin to Greek ōps eye — more at eye

First Known Use: 1884

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