ommatidium
[/ˌɒməˈtɪdiəm/]
nounmasculinepl: ommatidia
omatídio
1. A single photoreceptive unit or facet of a compound eye in arthropods, consisting of a lens, crystalline cone, and photoreceptor cells
Each ommatidium in an insect's compound eye functions independently to detect light and movement.
Cada omatídio no olho composto de um inseto funciona independentemente para detectar luz e movimento.
2. The fundamental structural and functional unit of compound eyes found in insects, crustaceans, and other arthropods
The dragonfly's exceptional vision is due to thousands of ommatidia working in concert.
A visão excepcional da libélula deve-se a milhares de omatídios trabalhando em conjunto.
This is a highly specialized scientific term used primarily in entomology, biology, and optics research. It is not commonly used in everyday conversation in either Brazil or the USA, appearing mainly in academic and scientific contexts. The term derives from Greek 'omma' (eye) and is fundamental to understanding arthropod vision in both Anglophone and Lusophone scientific communities.
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