ocellus Meaning, Definition & Usage

  1. noun an eye having a single lens
    simple eye; stemma.
  2. noun an eyelike marking (as on the wings of some butterflies); usually a spot of color inside a ring of another color
    eyespot.

WordNet

O*cel"lus noun
Etymology
L., dim. of oculus an eye.
Wordforms
plural Ocelli
Definitions
  1. (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.

Webster 1913