D defs.my
Entry 4 senses Webster, 1913

Eyeglass

/īg'-lăsˌ/ · Eye·glass · IPA /ˈaɪˌɡlæs/
01 n. A lens of glass worn in front of the eye to assist vision; -- usually used in the plural, referring to a pair of lenses fixed together in a…
  1. 1.
    A lens of glass worn in front of the eye to assist vision; -- usually used in the plural, referring to a pair of lenses fixed together in a frame, and worn resting on the bridge of the nose, to improve the vision. A single eyeglass in a frame is called a monocle. Also: monocle
  2. 2.
    Eyepiece of a telescope, microscope, etc.
  3. 3.
    The retina.[Poetic]
  4. 4.
    A glass eyecup. See Eyecup. See: Eyecup