a. [ Cf. F. binoculaire. See Binocle. ] 1. Having two eyes. “Most animals are binocular.” Derham. [ 1913 Webster ]
2. Pertaining to both eyes; employing both eyes at once; as, binocular vision. [ 1913 Webster ]
3. Adapted to the use of both eyes; as, a binocular microscope or telescope. Brewster. [ 1913 Webster ]
n. A binocular glass, whether opera glass, telescope, or microscope. [ 1913 Webster ]
adv. In a binocular manner. [ 1913 Webster ]