ommatidia
ommatidia — noun
1. Each of the many tiny light-sensitive structures that, packed together in large
Each of the many tiny light-sensitive structures that, packed together in large numbers, form the faceted visual organ on the head of an insect, crustacean, or other arthropod — with every unit operating independently like a miniature eye.
Under a microscope, Yasmin saw the thousands of ommatidia forming a bee's compound eye.
ommatidia + of + bee compound eye — microscope observation
A dragonfly's ommatidia each work like tiny cameras that detect light from one direction.
each ommatidium + in + [insect] + works like — analogy
The mantis shrimp has some of the most complex ommatidia of any animal.
Wei showed the class a picture of housefly ommatidia arranged in neat, regular rows.
Ommatidia are packed so tightly that a bee sees less detail than a human does.
文法句型
ommatidia + of + [arthropod/insect]
number + ommatidia
用法筆記
The plural form ommatidia is far more common than the singular ommatidium, since compound eyes are always discussed in terms of many units. Common in entomology, marine biology, and comparative anatomy writing.