Ommateal

Ommatidial (om-at-e/ -al, om-at-id' -e-al). In biology, pertaining to the atidium or single eye of an arthropod. O. yer, the inner layer of that part of the epidermis which the optic ganglion originated in decapods, insisting of retinophorae surrounded by their circles retinulie. atidium (om-at-id' -e-um). In biology, one of e closely-packed, radially arranged single eyes coming the compound eye of an arthropod. Each matidium has three chief constituents, the retinula, crystal cone, the hypodermal elements (cornea, ' Ommatophore (om-af -o-for). In biology, one of the eye-stalks, ophthaltes, or eye-bearing tentacles of various in ver tetes.