ommatidium

English Thesaurus

1. any of the numerous small cone-shaped eyes that make up the compound eyes of some arthropods (noun.body)

hypernym	:	ocellus, simple eye, stemma,
definition	:	an eye having a single lens (noun.body)

part meronym	:	compound eye,
definition	:	in insects and some crustaceans: composed of many light-sensitive elements each forming a portion of an image (noun.body)