- the simple eyespot of certain invertebrates, as distinguished from the compound eye of an insect or the camera-type eye of vertebrates and cephalopods
- an eyelike spot, as on a peacock's feathers
Origin: L, diminutive of oculus, eye
- ocellar adjective
Used by arrangement with John Wiley & Sons, Inc.
noun pl. o·cel·li
- A small simple eye, found in many invertebrates, usually consisting of a few sensory cells and a single lens.
- A marking that resembles an eye, as on the tail feathers of a male peacock; an eyespot.
Origin: Latin, diminutive of oculus, eye; see okw- in Indo-European roots.
- o·celˈlar adjective
ocellus - Science Definition
Plural ocelli ocelli
- A small, simple eye or eyespot, found in many invertebrates.
- A marking that resembles an eye, as on the wings of some butterflies.
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