optic

American  

[op-tik] / ˈɒp tɪk /

adjective

1. of or relating to the eye or sight.

2. optical.

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noun

1. the eye.

2. a lens of an optical instrument.

Optic ¹ British  

/ ˈɒptɪk /

noun

1. a device attached to an inverted bottle for dispensing measured quantities of liquid, such as whisky, gin, etc

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optic ² British  

/ ˈɒptɪk /

adjective

1. of or relating to the eye or vision

2. a less common word for optical

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noun

1. an informal word for eye 1

optic Scientific  

/ ŏp′tĭk /

1. Relating to or involving the eye or vision.

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Other Word Forms

• interoptic adjective
• nonoptic adjective
• postoptic adjective
• preoptic adjective
• suboptic adjective

Etymology

Origin of optic

1535–45; < Medieval Latin opticus < Greek optikós, equivalent to opt ( ós ) seen (verbid of ópsesthai to see) + -ikos -ic

Explanation

If you describe something as optic, it has something to do with eyes or vision. Your optic nerve, for example, sends information to your brain from your eyes. You'll most often find the adjective optic in anatomy or biology textbooks, describing the parts of an eye, or disorders involving the eye. Your optic disc is a tiny blind spot that all humans have on their eyeballs, and optic neuritis is an inflammation of the optic nerve. When it's a noun, optic is an old-fashioned, jokey way to say "eyeball." Optic comes from the Greek optikos, "of or having to do with sight."

Example Sentences

Three weeks ago, the Oscars production team loaded its equipment into the Dolby Theatre: more than 800 lighting fixtures, a custom PA system and massive fiber optic cables that run underground.

From Los Angeles Times • Mar. 13, 2026

This theory underpins much of today's technology, including computer chips, lasers, fiber optic communication, solar panels, MRI scanners, electron microscopes, and the atomic clocks used in GPS systems.

From Science Daily • Mar. 10, 2026

The vast Arctic island is connected to the world by two subsea fibre optic cables to Canada and Iceland, in addition to satellite coverage in the north and east.

From Barron's • Mar. 3, 2026

Both Digital Realty and Equinix control real estate in sought-after locales like Northern Virginia, Illinois and Northern California, with prime access to electricity, fiber optic capacity and key customers.

From Barron's • Feb. 6, 2026

“And yours truly will continuously wink one optic or the other.”

From "The Once and Future King" by T. H. White