(redirected from ocelli)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to ocelli: ocellus


, pl.


(ō-sel'ŭs, -lī),
1. The simple eye found in many invertebrates. Synonym(s): eyespot (2)
2. Facet of the compound eye of an insect.
[L. dim. of oculus, eye]
Farlex Partner Medical Dictionary © Farlex 2012


n. pl. ocelli (ō-sĕl′ī′)
1. A simple eye, found in many invertebrates, consisting of a number of sensory cells and often a single lens.
2. A marking that resembles an eye, as on the tail feathers of a male peacock; an eyespot.

o·cel′lar (ō-sĕl′ər) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


a single eye with a single lens found in insects and some other invertebrates.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Posterior ocelli usually separated by a little less than an ocellar diameter.
The radiolar ocelli are derived from epithelial cells in the outer aboral corners of the radioles (Fig.
Vertex flat, lacking ocelli. Occiput distinctly convex, with distinct median and lateral longitudinal furrows.
Head in general form transverse, subtrigonal: occiput in cephalic aspect transverse truncate, with very low and rounded juxta-ocular swellings: front dorsad of the ocelli with arcuate carination: facial shield strongly transverse, low the width at least three times the greatest depth, dorsal margin arcuate, clypeus produced in a conical tubercle: eyes prominent, almost semicircular in outline when seen from the front, and subglobose in dorsal view, in lateral view the eyes are ovate in basal outline: antennae imperfect, proximal joint small.
Head: Scape bare except for marginal ring of short setae; pedicel short and setose, with some longer ventral apical setae; frontal vitta with strongly convex elongate oval area surrounding ocelli and extending half the distance from anterior ocellus to anterior margin of frons; 2 pairs of fronto-orbital setae, 1 large and above level of ocelli, 1 smaller below; postocellar, outer and inner vertical setae well-developed.
Dark spot behind gills large, forming 5 1-2 conspicuous white-rimmed ocelli or merged double ocelli without dark brown bar immediately behind 3a.
Collectively known as Bush Browns, they possess a regular series of submarginal ocelli on the hindwings, and a pair of ocelli on the forewings, of which the lower ocellus is always the largest.
Eyes shortly stylate; ocelli distant from each other, the interocellar distance distinctly shorter than distance from ocellus to eye; labium not reaching anterior coxae.
He cut down the indoor bamboo forest and reemployed it in a gallery area above daughter Ocelli's bedroom.