Noun: ommatidium (ommatidia) ,ó-mu'ti-dee-um
- Any of the numerous small cone-shaped eyes that make up the compound eyes of some arthropods
"Each ommatidium in a fly's eye contributes to its overall vision"
Derived forms: ommatidia
Type of: ocellus, simple eye, stemma
Part of: compound eye
Encyclopedia: Ommatidium