Bible Dictionaries
Dioptrical

Webster's Dictionary

(a.) Of or pertaining to dioptrics; assisting vision by means of the refraction of light; refractive; as, the dioptric system; a dioptric glass or telescope.

Bibliography Information
Webster, Noah. Entry for 'Dioptrical'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​d/dioptrical.html. 1828.