eyeglass

/ˈaɪˌɡlæs/
noun
  1. A single lens worn to correct vision in one eye, often held in place by the eye socket muscles (monocle).
    • In the 19th century, an eyeglass was a fashionable accessory for men.
    • The old gentleman wore an eyeglass on a chain around his neck.
    • He adjusted his eyeglass to get a better look at the map.
  2. A lens or device used to aid vision, such as a magnifying glass or eyepiece.
    • She held the eyeglass up to her eye to read the tiny print.
    • The scientist looked through the eyeglass of the microscope.
    • The jeweler used an eyeglass to inspect the diamond closely.
Synonyms
What does "eyeglass" mean? | whatsthatwordmean | whatsthatwordmean