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