- a type of simple eye common to invertebrates, consisting of retinal cells, pigments, and nerve fibers.
- an eyelike spot, as on a peacock feather.
Origin of ocellus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ocellus
Ocellus, Count of Nantes, and most of the inhabitants of Brittany, were buried in that city.Mediaeval Tales
The usual markings occur, but there is no eye-spot, or ocellus, on the primaries.The Butterfly Book
William Jacob Holland
An ocellus with a smaller near it, called also Sesquiocellus.An Introduction to Entomology: Vol. IV (of 4)
The lower margin or base of the dark-blue centre of the ocellus is deeply indented on the line of the shaft.
The shading above the white mark on the summit of the ocellus is here a little too dark.
- the simple eye of insects and some other invertebrates, consisting basically of light-sensitive cells
- any eyelike marking in animals, such as the eyespot on the tail feather of a peacock
- an enlarged discoloured cell in a leaf
- a swelling on the sporangium of certain fungi
C19: via New Latin from Latin: small eye, from oculus eye
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- 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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