Di*op"tric (?), Di*op"tric*al (?), a. [Gr. belonging to the use of the ; = through + the root of I shall see: cf. F. dioptrique.]
Of or pertaining to dioptrics; assisting vision by means of the refraction of light; refractive; as, the dioptric system; a dioptric glass or telescope.
Dioptric curve Geom., a Cartesian oval. See under Cartesian.
© Webster 1913.