First Known Use: 1884
Dictionary
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
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Origin of OMMATIDIUM
New Latin, from Greek ommat-, omma eye; akin to Greek ōps eye — more at eye
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