binocular

[buh-nok-yuh-ler, bahy-]

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.

adjective

1. involving both eyes.

   binocular vision.

binocular

/ baɪ-, bɪˈnɒkjʊlə /

adjective

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

   binocular vision

binocular

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

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

• binocularity noun
• binocularly adverb

Word History and Origins

Origin of binocular¹

First recorded in 1705–15; bin- + ocular

Word History and Origins

Origin of binocular¹

C18: from _bi- ¹ + Latin oculus eye

Example Sentences

Many cruise lines offer educational seminars to prepare you for each port, binocular training to help you spot wildlife, and excursions ranging from fishing and hiking to food tours and animal encounters.

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You half-expect to see his pupils pop out of his binocular lenses.

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Ms. Rosenberg is easily identifiable thanks to a binocular contraption she straps around her head, which is attached to bifocal lenses that allow her to quickly turn between the judge’s magnified expression and her sketches.

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A popular one involves binocular rivalry: if different images are shown to a person’s left and right eye, their conscious perception flips between them.

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By the end of the month, Mars gives us a binocular treat as it moves through the stars of the loose star cluster known as “The Beehive” in the center of Cancer’s stars.

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