from The Century Dictionary and Cyclopedia
- Possessing a well-developed crystalline lens or cone: said of the eyes of certain insects, as the Hymenoptera and Lepidoptera, many Coleoptera, Neuroptera, etc.: opposed to acone and pseudocone.
Sorry, no etymologies found.
Acone: applied to compound eyes in which the individual ocelli have no crystalline cone or lens; see eucone.