a) A simple eye consisting of a single lens and a small number of sensory cells
b) 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
See Also: ocellar, ocellary, ocellated, ocellation

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  • OCELLUS — nomen floris eximii, Oeillet, de quo sic Franc. Pomey, Ocellus, anne sic dictus, quod in eius aspectu blandissime acquiescat oculus, an quod ipsemet sit hortorum oculus et ornamentum? Nihil certe spectare oculus possit, vel eius formosius formâ;… …   Hofmann J. Lexicon universale

  • Ocellus — O*cel lus, n.; pl. {Ocelli}. [L., dim. of oculus an eye.] (Zo[ o]l.) (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. [1913 Webster] …   The Collaborative International Dictionary of English

  • Ocellus — (lat.), 1) Äuglein; 2) so v.w. Auge 3) …   Pierer's Universal-Lexikon

  • ocellus — [ō sel′əs] n. pl. ocelli [ō sel′ī΄] [L, dim. of oculus,EYE] 1. the simple eyespot of certain invertebrates, as distinguished from the compound eye of an insect or the camera type eye of vertebrates and cephalopods 2. an eyelike spot, as on a… …   English World dictionary

  • Ocellus — An ocellus (plural: ocelli) is a type of photoreceptor organ in animals. Also called simple eyes , ocelli are miniature eyes capable of sensing light but not distinguishing its direction. See also stemmata, which are structurally similar. Ocelli… …   Wikipedia

  • Ocellus — Gesichtspartie eines Triops mit zwei Komplexaugen und einem Ocellus Als Ocellus (lat. „Äuglein“, Mehrzahl Ocelli bzw. Ocellen) werden in der Zoologie die punktförmigen Lichtsinnesorgane (Punktaugen) und Hautaugen verschiedener Tiergruppen… …   Deutsch Wikipedia

  • ocellus — (plural ocelli)) an eye like spot, usually rounded with a lighter border, e.g. the ocellus on the wings of some Rajidae …   Dictionary of ichthyology

  • ocellus — noun (plural ocelli) Etymology: New Latin, from Latin, diminutive of oculus eye more at eye Date: 1819 1. a minute simple eye or eyespot of an invertebrate 2. an eyelike colored spot (as on a peacock feather or the wings of some butterflies) •… …   New Collegiate Dictionary

  • ocellus — n.; pl. ocelli [L. dim. oculus, eye] 1. The simple eyes or eyespots, occurring singly or in small groups, found in many invertebrates. 2. (ARTHROPODA: Crustacea) see nauplius eye. 3. (ARTHROPODA: Insecta) see stemma, ommata. 4. (MOLLUSCA:… …   Dictionary of invertebrate zoology

  • ocellus — /oh sel euhs/, n., pl. ocelli /oh sel uy/. 1. a type of simple eye common to invertebrates, consisting of retinal cells, pigments, and nerve fibers. 2. an eyelike spot, as on a peacock feather. [1810 20; < L: little eye, dim. of oculus EYE; see… …   Universalium

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