Main Entry: om·ma·tid·i·um

Pronunciation: \ˌä-mə-ˈti-dē-əm\

Function: noun

Inflected Form(s): plural om·ma·tid·ia \-dē-ə\

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

Date: 1884

: 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