Binoculars are a type of optical device consisting of two telescopes mounted side-by-side and aligned to point in the same direction. The term 'binoculars part' refers to the three components that make up a binocular: the LENS, EYEPIECE, and PRISM. The LENS is the curved piece of glass at the front of the binoculars that gathers light and focuses it onto the EYEPIECE. The EYEPIECE is the magnifying LENS at the back of the binoculars that magnifies the image formed by the LENS. Finally, the PRISM is the triangular piece of glass inside the binoculars that reflects the light from the LENS to the EYEPIECE. Together, these three parts work together to create the binoculars' magnified view.