Also found in: Thesaurus, Medical, Financial, Encyclopedia, Wikipedia.


n. pl. oc·u·li (-lī′) Architecture
An eyelike opening or ornament, especially:
a. A round window.
b. A circular opening at the apex of a dome.

[Medieval Latin, from Latin, eye; see okw- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Botany) botany the leaf bud or beginnings of a leaf in a plant
2. (Architecture) architect a circular aperture
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.oculus - the organ of sightoculus - the organ of sight      
sense organ, sensory receptor, receptor - an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation
visual system - the sensory system for vision
naked eye - the eye unaided by any optical instrument that alters the power of vision or alters the apparent size or distance of objects; "it is not safe to look directly at the sun with the naked eye"
peeper - an informal term referring to the eye
oculus dexter, OD - the right eye
oculus sinister, OS - the left eye
ocellus, simple eye, stemma - an eye having a single lens
compound eye - in insects and some crustaceans: composed of many light-sensitive elements each forming a portion of an image
choroid, choroid coat - a highly vascular membrane in the eye between the retina and the sclera; a dark pigmentation minimizes the scattering of light inside the eye
ciliary body - the part of the tunic of the eye between the choroid coat and the iris; "the ciliary body produces aqueous humor"
eyelid, lid, palpebra - either of two folds of skin that can be moved to cover or open the eye; "his lids would stay open no longer"
canthus - either of the corners of the eye where the upper and lower eyelids meet
epicanthic fold, epicanthus - a vertical fold of skin over the nasal canthus; normal for Mongolian peoples; sometimes occurs in Down's syndrome
nictitating membrane, third eyelid - a protective fold of skin in the eyes of reptiles and birds and some mammals
conjunctiva - a transparent lubricating mucous membrane that covers the eyeball and the under surface of the eyelid
eyeball, orb - the ball-shaped capsule containing the vertebrate eye
eye muscle, ocular muscle - one of the small muscles of the eye that serve to rotate the eyeball
cornea - the transparent dome-shaped anterior portion of the outer covering of the eye; it covers the iris and pupil and is continuous with the sclera
uvea - the part of the eye that contains the iris and ciliary body and choroid
uveoscleral pathway - a tubule that drains excess aqueous humor
iris - muscular diaphragm that controls the size of the pupil which in turn controls the amount of light that enters the eye; it forms the colored portion of the eye
crystalline lens, lens of the eye, lens - biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focuses light on the retina
arteria centralis retinae, central artery of the retina - a branch of the ophthalmic artery; enters the eyeball with the optic nerve
arteria ciliaris, ciliary artery - one of several arteries supplying the choroid coat of the eye
arteria lacrimalis, lacrimal artery - an artery that originates from the ophthalmic artery and supplies the lacrimal gland and rectal eye muscles and the upper eyelid and the forehead
lacrimal vein, vena lacrimalis - drains the lacrimal gland; empties into the superior ophthalmic vein
lacrimal apparatus - the structures that secrete and drain tears from the eye
retina - the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve
sclera, sclerotic coat - the whitish fibrous membrane (albuginea) that with the cornea forms the outer covering and protection of the eyeball
musculus sphincter pupillae, pupillary sphincter - a ring of smooth muscle surrounding the iris
face, human face - the front of the human head from the forehead to the chin and ear to ear; "he washed his face"; "I wish I had seen the look on his face when he got the news"
colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
aperture - a natural opening in something
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Oculus Transport, a western Canadian oilfield transport and logistics firm, is getting a C$45 million capital boost to fuel its growth.
Sunderland Software Centre-based Oculus HR, which provides human resources support to firms across the UK, reported record growth last year.
Facebook is reportedly making an effort to bring exclusive VR versions of popular video game titles to give its Oculus VR gaming business a big push forward.
LONDON (Alliance News) - VR Education Holdings PLC said Thursday it had signed an agreement with a US aviation and aerospace museum to use its Apollo 11 virtual reality product, which also has been chosen for a new Oculus promotion programme being launched by Facebook Inc.
Facebook's Oculus Quest and Rift S are now shipping globally, the company said in a blog post.
BANGOR University Lecturer Dr Llyr ap Cenydd has been Talking About the Future of VR Technology as Oculus, owned by Facebook is set to launch their new Oculus Quest headset.
The Oculus Quest and the Oculus Rift S VR headsets are now up for pre-orders in the US and will ship from May 21.
Oculus has released an updated version of its flagship VR headset that works with a PC to let people play in virtual worlds.
Summary: California [USA], Mar 5 (ANI): Facebook is reportedly working on a business edition of its Oculus Go and Oculus Quest VR headsets.
ZeniMax Media on Wednesday said it struck a deal with Facebook-owned Oculus to settle a lawsuit over the video game giant's virtual reality technology.
Oculus Quest, which comes with touch controllers and does not need a PC to operate, will be priced at $399, according to the company.