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3 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Om·ma·tid·i·um n.; pl. Ommatidia   Zool. One of the single eyes forming the compound eyes of crustaceans, insects, and other invertebrates; one of the eyes of an ommateum.
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From: WordNet (r) 2.0

 ommatidium
      n : any of the numerous small cone-shaped eyes that make up the
          compound eyes of some arthropods
      [also: ommatidia (pl)]

From: WordNet (r) 2.0

 ommatidia
      See ommatidium