OCELLUS
eyespot, ocellus
(noun) an eyelike marking (as on the wings of some butterflies); usually a spot of color inside a ring of another color
Source: WordNet® 3.1
Etymology
Noun
ocellus (plural ocelli)
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.
Anagrams
• Cuellos, locules
Source: Wiktionary
O*cel"lus, n.; pl. Ocelli. Etym: [L., dim. of oculus an eye.] (Zoöl.)
(a) A little eye; a minute simple eye found in many invertebrates.
(b) An eyelike spot of color, as those on the tail of the peacock.
Source: Webster’s Unabridged Dictionary 1913 Edition