optical instrument (part of speech: noun)
eyepiece, magnifying glass, camera, optical instrument, periscope, microscope, eyeglass, lorgnette, prism, concave lens, field glasses, mirror, pince-nez, convex lens, ocular, telescope, condenser, binocular, lens
- As he spoke, he bent over, and, taking a magnifier from his pocket, examined the lace, which still fluttered where it was caught. - "The Rome Express", Arthur Griffiths.
- Examined with a magnifier it will be noticed that there is no such regularity of arrangement in straight rows as is conspicuous in pine. - "Seasoning of Wood", Joseph B. Wagner.
- A powerful magnifier was required to see all this. - "New observations on the natural history of bees", Francis Huber.