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The Collaborative International Dictionary
Ocellus

Ocellus \O*cel"lus\, n.; pl. Ocelli. [L., dim. of oculus an eye.] (Zo["o]l.)

  1. A little eye; a minute simple eye found in many invertebrates.

  2. An eyelike spot of color, as those on the tail of the peacock.

Wiktionary
ocellus

n. 1 A simple eye consisting of a single lens and a small number of sensory cells 2 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

WordNet
ocellus
  1. n. an eye having a single lens [syn: simple eye, stemma]

  2. an eyelike marking (as on the wings of some butterflies); usually a spot of color inside a ring of another color [syn: eyespot]

  3. [also: ocelli (pl)]

Wikipedia
Ocellus (disambiguation)

An ocellus is a simple eye found in invertebrates, in which pigment is distributed randomly and for which there are no additional structures. It is not to be confused with the ocelloid, a light-sensitive structure found in some dinoflagellates.

Ocellus may also refer to:

  • Ocellus (mimicry), an eye-like marking
  • Ocellus Lucanus (5th century BC), ancient Greek philosopher

Usage examples of "ocellus".

This eye structure has always seemed remarkable to me in a beast whose haunts were on a glaring field of ice and snow, and though I found upon minute examination of the eyes of several that Thuvan Dihn and I killed, that time that we passed through the carrion caves, that each ocellus is furnished with its own lid, and that the animal can, at will, close as many of the facets of its huge eyes as it wishes, yet I am sure that nature has thus equipped him because much of his life is spent in dark, subterranean recesses.

Each ocellus is furnished with its own lid, and the apt can, at will, close as many of the facets of his huge eyes as he chooses.

Each ocellus is furnished with its own lid, so that the apt can close as many of the facets of its eyes as it wishes.

This eye structure seemed remarkable in a beast whose haunts were upon a glaring field of ice and snow, and though I found upon minute examination of several that we killed that each ocellus is furnished with its own lid, and that the animal can at will close as many of the facets of his huge eyes as he chooses, yet I was positive that nature had thus equipped him because much of his life was to be spent in dark, subterranean recesses.

The chief divisions of nature into active and passive causes, its system of generation and destruction, and the concurrence of the two great principles, Heaven and earth, uniting to form all things, will, according to Ocellus, always continue to exist.

The doctrine of Ocellus was the general doctrine everywhere, it naturally occurring to all to make the same distinction.

And accordingly Ocellus Lucanus, the Disciple of Pythagoras, held that the principal cause of all sublunary effects resided in the Zodiac, and that from it flowed the good or bad influences of the planets that revolved therein.

Its two huge eyes extend in two vast oval patches from the centre of the top of the cranium down either side of the head to below the roots of the horns, so that these weapons really grow out from the lower part of the eyes, which are composed of several thousand ocelli each.

Its two huge eyes extend in large oval patches from the center of the top of the cranium down either side of the head to below the roots of the horn, so that these weapons really grow out from the lower part of the eyes, which are composed of several thousand ocelli each.

They extend in two vast, oval patches from the center of the top of the cranium down either side of the head to below the roots of the horns, so that these weapons really grow out from the lower part of the eyes, which are composed of several thousand ocelli each.

The Korozhet can exude suckerlike pedicellaria, ocelli (simple eyes) and other sensory organelles from the hollow spines.

Smith has observed, the larger workers have simple eyes (ocelli), which though small can be plainly distinguished, whereas the smaller workers have their ocelli rudimentary.

For the workers of Myrruica have not even rudiments of ocelli, though the male and female ants of this genus have well-developed ocelli.

They had no eyestalks like Earthly spiders, but they might have had any number of ocelli set within their fur.