ocellus

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“
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.

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Definitions (12)

Toggle American Heritage definitions American Heritage Dictionary (2)

  1. noun A small simple eye, found in many invertebrates, usually consisting of a few sensory cells and a single lens.
  2. noun A marking that resembles an eye, as on the tail feathers of a male peacock; an eyespot.

Toggle Century definitions Century Dictionary (7)

Toggle GNU Webster definitions GNU Webster's 1913 (1)

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Examples (18)

  • Young insects are often difficult to distinguish from true worms, centipedes, snails, and such forms, but after one has collected and reared some of the young and watched them pass through the different stages and emerge with wings they are much more easily recognized Their Principal Characteristics Illustration: Face of grasshopper enlarged showing parts; ant., antenna; eye, compound eye; oc., ocellus or simple eye; cl., clypeus; lbr., labrum or upper lip; mx. —  An Elementary Study of Insects
  • 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. —  Thuvia, Maid of Mars
  • Dioptric: with a transversely divided ocellus. —  Explanation of Terms Used in Entomology
  • Ocelli: plural of ocellus; q.v.; = stemmata. —  Explanation of Terms Used in Entomology
  • Insects have two sets of organs for vision, the faceted eye and the so-called simple eye, or ocellus. —  The World's Greatest Books — Volume 15 — Science
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Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. Latin, diminutive of oculus, eye; see okw- in Indo-European roots.

Toggle Century etymologies Century Dictionary (1)

  1. Latin, a little eye, a bulb or knot on the root of a reed, diminutive of oculus, eye: see oculus.
 

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/əˈsɛləs/
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