Definition: combination of lenses at the viewing end of optical instruments
Similar words: lens, lens system, lense
Definition: a transparent optical device used to converge or diverge transmitted light and to form images
Definition: visible
Usage: be sure of it; give me the ocular proof- Shakespeare; a visual presentation; a visual image
Similar words: seeable, visible
Definition: capable of being seen; or open to easy view
Usage: a visible object; visible stars; mountains visible in the distance; a visible change of expression; visible files