binocular

American  

[buh-nok-yuh-ler, bahy-] / bəˈnɒk yə lər, baɪ- /

noun

1. Also called pair of binoculars,.  Also called prism binoculars.  Usually binoculars. an optical device, providing good depth effect, for use with both eyes, consisting of two small telescopes fitted together side by side, each telescope having two prisms between the eyepiece and objective for erecting the image.

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adjective

1. involving both eyes.

   binocular vision.

binocular British  

/ baɪ-, bɪˈnɒkjʊlə /

adjective

1. involving, relating to, seeing with or intended for both eyes

   binocular vision

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binocular Scientific  

/ bə-nŏk′yə-lər /

1. Relating to or involving both eyes at once, as in binocular vision.

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1. An optical device, such as a pair of field glasses, consisting of two small telescopes, designed for use by both eyes at once. Often used in the plural as binoculars.

Other Word Forms

Derived Forms

• binocularly
  adverb
• binocularity
  noun

Etymology

Origin of binocular

First recorded in 1705–15; bin- + ocular

Example Sentences

To improve those measurements, researchers from MPE and LMU used the Large Binocular Telescope in Arizona, USA.

From Science Daily • Apr. 29, 2026

Interest in the asteroid heightened in 2021, when studies by the Large Binocular Telescope Observatory in Arizona first suggested its composition more closely resembles a Moon rock than a typical asteroid.

From Science Magazine • Apr. 19, 2024

Astronomers looked at it with two telescopes in Arizona — the Large Binocular Telescope and the Lowell Discovery Telescope — and used the reflected light to identify its minerals.

From New York Times • Nov. 11, 2021

Marc-Andre Besel & Wiphu Rujopakarn/Large Binocular Telescope Corporation In April, something went awry at the astronomical observatory atop Mount Graham, a 3,200-metre peak in Arizona.

From Nature • Jul. 10, 2013

Binocular parallax, or the differing views of the same solid object obtained by the two eyes.

From Psychology A Study Of Mental Life by Woodworth, Robert S.