optical
UK /ˈɒptɪkəl/ · US /ˈɑptɪkəl/ adjective, noun
Forms opticals
- adjective Of or relating to sight; visual. “Strabismus is an optical defect.”
- adjective Designed to assist or enhance sight “A microscope is an optical instrument.”
- adjective Of or relating to optics. “Refraction is an optical effect.”
- adjective Of or relating to visible light. “Optical telescopes don't work when it is cloudy.”
- adjective Incorporating light-sensitive devices. “An optical switch opens the door automatically.”
- noun (film) Any special effect requiring laboratory work on the film.
Synonyms
Etymology
From optic + -al.
Webster’s 1913
- adjective Of or pertaining to vision or sight.
- adjective Of or pertaining to the eye; ocular; as, the optic nerves (the first pair of cranial nerves) which are distributed to the retina.
Etymology [F. optique, Gr. oculus eye. See Ocular, Eye, and cf. Canopy, Ophthalmia.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “optical”, CC BY-SA 4.0. Details