Ommatidium Om`ma*tid"i*um, n.; pl. {Ommatidia}. [NL., dim. of Gr. ?, ?, the eye.] (Zo["o]l.) One of the single eyes forming the compound eyes of crustaceans, insects, and other invertebrates; one of the eyes of an ommateum. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • ommatidia — (Order Isopoda): Individual visual components of the compound eye [Kensley and Schotte, 1989] …   Crustacea glossary

  • ommatidia — É‘mÉ™ tɪdɪəm / É’m n. single part of a compound eye in arthropods (Zoology) …   English contemporary dictionary

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  • Ommatidium — Ommatidium: A – cornea, B – crystalline cone, C D – pigment cells, E – rhabdom, F – photoreceptor cells, G – membrana fenestrata, H – optic nerve The compound eyes of insects, mantis shrimp and millipedes[1] are composed of units called ommatidia …   Wikipedia

  • Eye — For other uses, see Eye (disambiguation), Ocular (disambiguation), Ocular, and Oculus. For taxon specific articles, see human eye, simple eye in invertebrates, mollusc eye, and arthropod eye. Eye …   Wikipedia

  • photoreception — photoreceptive, adj. /foh toh ri sep sheuhn/, n. the physiological perception of light. [1905 10; PHOTO + RECEPTION] * * * Biological responses to stimulation by light, most often referring to the mechanism of vision. In one celled organisms such …   Universalium

  • Arthropod eye — Anatomy of the compound eye of an insect The arthropods ancestrally possessed compound eyes, but the type and origin of this eye varies between groups, and some taxa have secondarily developed simple eyes. The organ s development through the… …   Wikipedia

  • Insect morphology — Legend of body parts Tagmata : A Head, B Thorax, C Abdomen. 1. antenna 2. ocelli (lower) 3. ocelli (upper) 4. compound eye 5. brain (cerebral ganglia) 6. prothorax …   Wikipedia

  • Arthropod — Temporal range: 540–0 Ma …   Wikipedia

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