noun eyepiece The lens or group of lenses that is closest to the eye in a microscope, telescope, or other optical instrument. 1
noun eyepiece optical device: lens 1
countable noun eyepiece The eyepiece of a microscope or telescope is the piece of glass at one end, where you put your eye in order to look through the instrument. 0
noun eyepiece The lens (or combination of lenses) at the eye end of a microscope or telescope by which the image is viewed. 0
noun eyepiece the lens or combination of lenses in an optical instrument nearest the eye of the observer 0
noun eyepiece in a telescope, microscope, or other optical instrument, the lens or lenses nearest the viewer's eye 0
