ocellus
noun
- a simple eye occurring in insects and other invertebrates
- an eyelike colored spot (as on a peacock feather or the wings of some butterflies)
Wiktionary
Pronunciation: /əʊˈsɛləs/
noun
Etymology: From Latin ocellus (“little eye”), from oculus (“eye”).
- A simple eye consisting of a single lens and a small number of sensory cells.
- An eyelike marking in the form of a spot or ring of colour, as on the wing of a butterfly or the tail of a peacock.