Definition of "binocular"

Most animals are binocular.

1713, W[illiam] Derham, Physico-Theology: Or, A Demonstration of the Being and Attributes of God, from His Works of Creation. […], London: […] W[illiam] Innys, […]

our perception of distance arises from the geometry of binocular vision and our early learning seems based on calculating probabilities.

2013 July 9, Joselle DiNunzio Kehoe, “Cognition, brains and Riemann”, in plus.maths.org‎, retrieved 2013-09-08

He gazed around until on the lid of a spinet he spotted a promising collection of bottles, gin, whiskey, vermouth and sherry, mixed with violin bows, a flute, a toppling pile of books, six volumes of Grove's Dictionary mingled with paperback thrillers, a guitar without any strings, a pair of binoculars, a meerschaum pipe and a jar half-full of wasps and apricot jam.

1956, Delano Ames, chapter 14, in Crime out of Mind‎