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ommatidium
[ om-uh-tid-ee-uhm ]
noun
- one of the radial elements composing a compound eye.
ommatidium
/ ˌɒməˈtɪdɪəm /
noun
- any of the numerous cone-shaped units that make up the compound eyes of some arthropods
ommatidium
/ ŏm′ə-tĭd′ē-əm /
, Plural ommatidia
- One of the tiny light-sensitive parts of the compound eye of insects and other arthropods. An ommatidium resembles a single simplified eye.
- See more at compound eye
Derived Forms
- ˌommaˈtidial, adjective
Other Words From
- omma·tidi·al adjective
Word History and Origins
Origin of ommatidium1
Word History and Origins
Origin of ommatidium1
Example Sentences
In an insect, each ommatidium in the compound eye has a corneal lens, a crystalline cone and a light-sensitive organ at its base.
The ommataeum, as already stated, tends to segregate into retinulae which correspond potentially each to an ommatidium of the compound eye.
The lateral eyes of Scorpio consist of groups of separate small lenses each with its ommatidium, but they do not form a continuous compound eye as in Limulus.
Each ommatidium is an elongated cone with its broad extremity abutting against the corneal lenticle.
The ommatidium is from the first segregate and consists of few cells.
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