(informal) An abridged, compressed, or concise version of something.

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

a study of the individuals in a group of people within a specific context and their relationships

(chemistry, in combination) Two atoms of chlorine in a molecule / (chemistry) molecular chlorine, Cl₂