|See also ocellus the convex eye of insects and some crustaceans, consisting of numerous separate light-sensitive units (ommatidia)|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|the offspring of a zebra and a donkey.|
An eye consisting of hundreds or thousands of tiny light-sensitive parts (called ommatidia), with each part serving to focus light on the retina to create a portion of an image. Most insects and some crustaceans have compound eyes.