I. (ˈ)bī|näkyələ(r) also bə̇ˈn- adjective
Etymology: bin- + ocular
1. : of or relating to both eyes
binocular infection
2. : employing both eyes at once ; specifically : producing an appearance of solidity or depth because of the slight difference in the two retinal images due to the angle from which each eye views an object
binocular vision
3. : adapted to the use of both eyes
a binocular microscope
• bin·oc·u·lar·i·ty (ˌ)bīˌnäkyəˈlarəd.ē also bə̇ˌn- noun -es
• bin·oc·u·lar·ly (ˈ)bī|näkyələ(r)lē, bə̇ˈn- adverb
II. bə̇näkyələ(r) also bī- noun
( plural binoculars ; but sometimes singular in construction )
: an optical instrument composed of two refracting telescopes mounted on a single frame and containing erecting systems usually with both focusing tubes simultaneously adjustable by means of a single screw
a 6-power binocular
the binoculars are in that leather case
— usually used in plural and often with pair
a pair of binoculars