I. adjectiveDate: 1738 of, relating to, using, or adapted to the use of both eyes <binocular vision> • binocularitynoun • binocularlyadverbII. nounDate: 1871 1. a binocular optical instrument 2. a handheld optical instrument composed of two telescopes and a focusing device and usually having prisms to increase magnifying ability — usually used in plural
Binocular Bin*oc"u*lar, a. [Cf. F. binoculaire. See Binocle.] 1. Having two eyes. ``Most animals are binocular.'' --Derham. 2. Pertaining to both eyes; employing both eyes at once; as, binocular vision. 3. Adapted to the use of both eyes; as, a binocular microscope or telescope. --Brewster.