dioptric

From Greek διοπτρικός. Compare diopter.

• IPA^(key): /daɪˈɒptɹɪk/

dioptric (comparative more dioptric, superlative most dioptric)

1. Acting as a medium for sight; making use of refraction (of lenses, etc.).
2. (obsolete) Pertaining to a diopter.
   • 2014, Umberto Eco, Island of the Day Before, London: Vintage Books, page 363:

     [W]ould the new Narcissus—without any dioptric or sciatherical computing—grasp the alternating skirmish of light and shadow.

3. (obsolete) Capable of being seen through.

dioptric (plural dioptrics)

1. (in the plural) The branch of optics concerned with refraction.
2. A dioptric telescope.

• dioptrical

• diprotic, protidic, tripodic

Borrowed from French dioptrique.

dioptric m or n (feminine singular dioptrică, masculine plural dioptrici, feminine and neuter plural dioptrice)

1. dioptric