binocular

Etymology

From French binoculaire.

adj

1. Using two eyes or viewpoints; especially, using two eyes or viewpoints to ascertain distance.
   a binocular microscope or telescope
   our perception of distance arises from the geometry of binocular vision and our early learning seems based on calculating probabilities. 2013-07-09, Joselle DiNunzio Kehoe, “Cognition, brains and Riemann”, in plus.maths.org, retrieved 2013-09-08

noun

1. attributive form of binoculars
2. A pair of binoculars.
   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
3. (dated) Any binocular glass, such as an opera glass, telescope, or microscope.