ˌäfˈthalməs, ÷ˌäpˈth- noun combining form
Etymology: New Latin, from Greek -opthalmos, from ophthalmos eye — more at ophthalmia
1. : one having a (specified) kind of eye — in generic names usually of arthropods
Meg ophthalmus
2. -es : eyes of a (specified) form or in a (specified state
megal ophthalmus